Liquid injection device for automobile water tank

The utility model discloses a liquid injection device for an automobile water tank, and relates to the technical field of liquid injection devices, the liquid injection device comprises a water tank, a protective sleeve, a water outlet pipe orifice and a water inlet pipe, the outer surface of the water tank is fixedly connected with the protective sleeve, the outer surface of the right side of the water tank is fixedly connected with the water outlet pipe orifice, and the top surface of the water tank is fixedly connected with the water inlet pipe. A first fixing block is fixedly connected to the inner surface of the water outlet pipe opening, and a filter element is movably connected to the outer surface of the first fixing block in a lap joint mode. The hose head is clamped to the outer surface of the butt joint, the hose head is attached to the outer surface of the hose head in cooperation with the swing rod, the hose head is fixed in an attached mode in cooperation with the semicircular pressing block, an