There are common problems in Chinese grain combine harvester，such as difficulty in balancing operational performance and efficiency，high failure rate，and low automation level. Feed quantity is one of the important parameters of grain combine harvester，which directly affects the machine's operational performance，overall reliability，and economic benefits. Only when the feeding quantity stabilizes within the rated range can the harvester achieve optimal efficiency. Starting from the fact that feeding amount has a vital impact on machine performance，this paper focuses on the detection function of feeding amount by domestic and foreign combine harvesters with the help of sensing technology. The feeding quantity is mainly reflected by measuring the torque or power of the transmission shaft of key working components through torque sensors and detecting the extrusion force of materials on the mechanical structure shell through pressure sensors. Secondly，machine vision and laser radar technology are used to identify crop density and the bending force of crop stems is measured by force sensor to indirectly represent the feeding quantity. In addition，the reasons that affect the signal processing of feed quantity detection and the key technologies and applications of automatic control of feed quantity in combine harvesters were analyzed and sorted out. Finally，this study proposes the problems existing in the feeding rate detection technology of existing grain combine harvesters，as well as future research priorities and development trends. Although there are many methods for detecting the feeding quantity of domestic combine harvester，they all have low detection accuracy，poor system stability，and are only suitable for a single crop，making it difficult to promote and apply on a large scale. Therefore，there is still great room for improvement in Chinese technology for detecting the feeding quantity of combine harvester. We should increase our research and development efforts on high-precision agricultural sensors and controllers to improve the overall stability of the detection system；The future combine harvester will move towards large-scale，intelligent，and integrated directions.

To solve the problem of poor sowing quality due to loose soil in wheat seedbed after land preparation in the Huang-Huaihai region of China, a double compression seeder for pre-sowing and seed furrow of wheat in wide-seedling belts was designed. The machine sowing operation was divided into two processes: pre-sowing compression and seed ditch compression, pre-sowing compression was carried out homogenization of the pre-sowing seed bed that the tractor wheel has crushed, and the seed ditch compression compresses the seeds and soil in the seed ditch, so that the seeds were embedded in the seed ditch soil. By analyzing the kinematics of the pre-planting compression device and the spiral blade in the process of soil levelling and compression, the structure of the equal-difference variable-diameter equal-pitch spiral conveying winch was designed, and the key parameters of the drum spiral blade were determined, and then the height of the spiral blades, the rutting distance and the speed of the compression roller were taken as the test factors, and the soil flatness was used as the index to carry out the discrete element simulation test. The simulation results show that when the spiral blade was 4.85 cm, the rut distance was 37.4 cm, and the rotation speed was 327.16 r/min, the optimal land flatness was 0.18. Finally, field experiments were carried out on the seeder, and the results showed that: the soil bulk density after operation was 22.7% greater than that before sowing (p < 0.01), and the soil flatness was 1.9 cm, which was consistent with the simulated results. The use of pre-sowing compression and seed furrow compression methods improved the soil environment of the seed bed, increased the uniformity of the seeding depth, and promoted the root growth of wheat. This study provides equipment support and technical reference for agricultural production in wheat-corn rotation areas in the Huang-Huaihai region of China.