The invention discloses an agricultural downhole silt cleaning device. The agricultural downhole silt cleaning device comprises a machine box, a motor room, turning wheels, hooks, hook rods, a bracket, silt storage buckets, a centrifugal pump, a lifting rod, a supporting rod, lifting rings, a rotary disc, a suction head, hanging rings, suction plates, telescopic sealing plates, slide balls and a telescopic cleaning brush. The agricultural downhole silt cleaning device has the beneficial effects that the bracket is installed at a wellhead and can bear the whole device through the hanging rods by installing the multiple handing rods on the two sides of the bracket, accordingly, the device cannot fall off, the situation that the only one hanging rod is fractured, the device is not supported and directly falls into a well can be effectively prevented through the multiple hanging rods, and the safety performance of the device is higher during using. By installing the multiple uniformly distributed slide balls on the outer walls of the two sides of the bottom of the centrifugal pump, the situation that the part, stretching into the well, of a pump body of the centrifugal pump collides with the wall of the well, and the centrifugal pump is damaged is effectively prevented; and the turning wheels and the hooks are installed at the top of the machine box and matched with the hanging rings on the silt storage buckets, so that the silt storage buckets are stored more conveniently and quickly without manual taking and placing.