Agricultural vehicle chassis with stepless-regulated wheel track

The invention belongs to the technical field of a vehicle chassis and relates to an agricultural vehicle chassis with a stepless-regulated wheel track. The longitudinal central planes of commonly used vehicle chassises of two groups of agricultural vehicle wheel track stepless regulation devices are arranged on a rectangular vehicle frame back and forth according to the vehicle wheel shaft distance; the two groups wheel track stepless regulation devices are respectively and fixedly connected with the front end and the back end of the vehicle frame through level tracks to form the agriculturalvehicle chassis with the stepless-regulated wheel track; each wheel track stepless regulation device consists of a screw rod, a nut, a slide block, a bearing rod, a vehicle wheel shaft, wheels, one level track, a coupler and a retarder; and the two retarders of the front and back wheel track stepless regulation devices are synchronously driven by an outer driving force, and input shaft rotating angles of the front and the back retarders are synchronously changed and kept the same, and distances between each wheel and the vehicle longitudinal central plane are symmetrically changed, so wheel track stepless regulation on the vehicle chassis is realized, and the mechanical operation requirement on crops with different row spaces is met. The agricultural vehicle chassis with the stepless-regulated wheel track is suitable for mechanical operation for field management in a growing period of the crops.