Assorted soil moisture preserving and land flattening roller for rotary cultivator

Provided is an assorted soil moisture preserving and land flattening roller for a rotary cultivator. The soil moisture preserving and land flattening roller is used in association with the rotary cultivator; the rotary cultivator is used in association with a tractor; the tractor is equipped with a hydraulic suspension control system; and the assorted soil moisture preserving and land flattening roller for the rotary cultivator comprises a rack, a compressing roller, and a land flattening tool. The rack is assembled with the rotary cultivator. The compressing roller is installed at the bottom of the rack. The land flattening tool is installed at the bottom of the rack and is located behind the compressing roller. A hydraulic cylinder is installed on the rack. The hydraulic suspension control system on the tractor controls the hydraulic cylinder on the rack; and the hydraulic cylinder controls the compressing force applied by the compressing roller to the soil. The utilization of the assorted soil moisture preserving and land flattening roller for the rotary cultivator allows more farmers to reduce the cost in farming, thereby providing a novel method for fighting a drought and preserving the soil moisture to the farmers in arid areas, and also giving sources for sprouting and germinating the seeds, with 20% of the cost for each mu (a unit of area) of land being saved. The modern agriculture and agricultural machinery as well as agronomy are integrated; and different land flattening tools and rollers are installed according to different agricultural requirements.