The invention discloses an aluminum phosphide rat repellent, which is prepared from the following raw materials in parts by weight: 56 to 65 parts of aluminum phosphide raw powder, 5 to 7 parts of polyethyleneglycol, 3 to 4 parts of ammonium carbamate, 5 to 6 parts of magnesium stearate, 5 to 6 parts of sodium carboxymethyl cellulose, 5 to 6 parts of starch and the balance of cyclodextrin, wherein the total quantity of the raw materials is 100 parts. The aluminum phosphide rat repellent has the advantages that the rat repellent effect is good; the practicability is high; the popularization and the implementation are easy. The invention also discloses a dosing device convenient for residue recovery. The dosing device comprises a vehicle body, wherein the vehicle body comprises a vehicle table and wheels; a connecting seat is connected onto the vehicle table through a mechanical arm; a drill bit is vertically arranged on the connecting seat; a hopper is also arranged on the connecting seat; the dosing device also comprises a material supply mechanism; a Bluetooth base station is also arranged on the vehicle table. The device has the advantages that the dosing is convenient; the residue recovery is convenient; the practicability is high.