The invention aims to solve the problem that a body of an existing agricultural automobile is not conveniently cleaned, and discloses a conveniently installed agricultural automobile cleaning device which comprises a water tank, a first connecting rod, a positioning plate, a second connecting rod, a telescopic air bag, a through hole, a guide tank, a water spraying disk, a sliding plate, a baffleplate, a sleeve pipe, a rotating shaft, a sleeve, a sleeve ring, a pushing rod, a first screw spring, a positioning block, a sliding rod, a supporting block, a rotating disk, a second screw spring, aguide rod, a connecting plate, an adsorption plate, a guide groove and a positioning rod. The cleaning device is convenient to install, the sleeve ring rotates through rotation of wheels, so that thepush plate can repeatedly push the sliding plate, the telescopic air bag is repeatedly extruded, so that water is conveniently sprayed onto a body, mud on the body is rapidly cleaned, cleanliness of the body is kept, and the cleaning device is worthy of popularization in the field of agricultural machinery.