Device for proventing wheel type tractor cave-in and sliding at paddy field

The utility model provides a paddy filed sinking and sliding-proof device for a wheel-type tractor used for preventing the tractor from sinking and sliding during the work in a paddy filed with the deep mud feet; the utility model is characterized in that a steel wheel is arranged outside steel rings of two drive wheels of the tractor with screws respectively; the size of the steel rings provided in the middle of the steel wheels is the same with that of the steel rings of the drive wheels; 8 sliding-proof blocks are arranged evenly in the radial direction around the center of rim faces of the wheels; the height of the sliding-proof blocks make the outer diameter of the steel wheel a little smaller than that of the drive wheels; and the side of each sliding-proof block which does not touch the ground is supported and reinforced by a steel bar. The utility model has the advantages of good effect on sinking and sliding-proof; the outer diameter of the steel wheels is smaller than that of the drive wheels, thus the road surface can not be affected and the steel wheels are not required to demount during the wheel operation, and the assembly and disassembly are both conveniently; besides, the utility model is easy in the structure and low in the manufacturing cost.