Front mounted winnowing machine of four-wheeled tractor

The utility model provides a four-wheel tractor front suspension winnowing machine. The technical problem to be solved is that the utility model provides the four-wheel tractor front suspension winnowing machine which can generate the wind to remove crop branches and leaf mixed in crop grains after threshing without requirement of the electric power. The technical key point is that a frame of the winnowing machine is fixedly on a bumper of the tractor; a belt wheel at the end of a shaft of a fan (5) is enwound with a triangle belt (2) which is enwound on a diesel engine belt wheel (1) through a tensioning horizontal wheel (3) and a tensioning trough wheel (4). The utility model has the technical effects of providing enough wind power by using the diesel engine on the tractor as the fan of the winnowing machine on the condition of no electric power or no natural wind or small natural wind, ensuring the smooth winnowing operation, leading the crop grains to timely obtain storage after removing the sundries after threshing. The utility model has the advantages of simple structure, convenient installation, adjustment and disassembly.