Backpack type coating storage tank

The utility model discloses a backpack type paint storage tank which comprises a tank body, the interior of the tank body is used for containing paint, a sliding block and a discharging port are arranged on the surface of the tank body, and the discharging port is communicated with the interior of the tank body; the backpack assembly comprises a connecting piece and two straps, the two straps are both installed on the connecting piece, the straps are used for being hung and buckled on the shoulders of a user, the connecting piece is provided with a containing space with an opening in one side, a sliding groove is formed in the inner wall of the containing space, the sliding groove is in sliding connection with the sliding block, and the tank body can slide into the containing space from the opening; one end of the connecting pipe is connected with the discharge hole; and the spray gun is communicated with the other end of the connecting pipe. The tank body for storing the coating can be detachably connected w