Harvesting and sowing integrated compound operation machine

1. A harvesting and sowing integrated compound operation machine comprising a combine harvester, a stubble cleaning device, a topsoil loosening device, a fertilization device, a rotary tillage and ditching device, a sowing device, a detection device, a first driving device, a second driving device and a control device, wherein the stubble cleaning device is mounted in front of a chassis of the combine harvester, and the stubble cleaning device is respectively connected to a conveying trough and the chassis of the combine harvester; the topsoil loosening device, the fertilization device, the rotary tillage and ditching device and the sowing device are sequentially mounted on a frame connected to a rear of the chassis; the detection device is configured to detect a movement displacement of a header and transmit the movement displacement to the control device; the first driving device is configured to drive the stubble cleaning device to operate; the second driving device is configured to drive the fertilization device, the rotary tillage and ditching device and the sowing device to operate; and the control device is respectively connected to an operating lever of the combine harvester, the detection device, the first driving device and the second driving device; the combine harvester is a rice combine harvester;

the topsoil loosening device comprises several topsoil loosening fertilization shovels; and the topsoil loosening fertilization shovels are mounted on a lower part of the frame, and the topsoil loosening fertilization shovels are located in front of a fertilizer discharge pipe of the fertilization device;

the rotary tillage and ditching device comprises a rotary tillage blade and a ditching blade; the ditching blade is arranged in a middle of the rotary tillage and ditching device, the rotary tillage blade is arranged on two sides of the ditching blade, and a rotation diameter of the ditching blade is greater than that of the rotary tillage blade; and a soil baffle is arranged behind the rotary tillage blade, and no soil baffle is arranged behind the ditching blade;

the harvesting and sowing integrated compound operation machine further comprises a seed ditch opener and a seed drop pipe; the seed ditch opener is mounted on a lower part of the frame and located below the sowing device; and an upper end of the seed drop pipe is connected to the sowing device, and a lower end of the seed drop pipe is located on a rear surface of the seed ditch opener;

the first driving device comprises a first hydraulic motor and a first cylinder; the first hydraulic motor is configured to drive the stubble cleaning device to carry out stubble cleaning work; one end of the first cylinder is hingedly connected to the stubble cleaning device, and other end of the first cylinder is hingedly connected to a bottom of the conveying trough of the combine harvester; and the stubble cleaning device is further hingedly connected to one end of a strut, and other end of the strut is hingedly connected to the chassis of the combine harvester;

the second driving device comprises a second hydraulic motor and a second cylinder; the second hydraulic motor is mounted on a transmission box on one side of the frame, the transmission box is respectively connected to a transmission shaft of the fertilization device and a transmission shaft of the rotary tillage and ditching device, the second hydraulic motor is configured to drive the fertilization device and the rotary tillage and ditching device to operate, and a driving force of the fertilization device is transmitted from the other end of the transmission shaft of the fertilization device to the sowing device, to drive the sowing device to operate; and a front end of the frame is hingedly connected to the chassis of the combine harvester, an upper end of the frame is hingedly connected to one end of the second cylinder, and other end of the second cylinder is hingedly connected to the combine harvester; and

the combine harvester is equipped with a grass chopper, and the grass chopper is arranged behind a threshing and cleaning part.

2. The harvesting and sowing integrated compound operation machine according to claim 1 , wherein the detection device is a pull-rope displacement sensor; and the pull-rope displacement sensor is mounted on a base of a cylinder configured to control lifting of the header of the combine harvester, and a pull rope of the pull-rope displacement sensor is connected to a bottom of the conveying trough.

3. The harvesting and sowing integrated compound operation machine according to claim 1 , wherein the control device is connected to the operating lever through a stroke switch.