Manual liquid adding gun

The invention discloses a manual liquid adding gun. The manual liquid adding gun comprises an outer gun tube head, a front sealing base, a valve trim assembly, an inner gun tube, a connecting rod, andan outer gun tube connecting plate, wherein the front sealing base is mounted in the outer gun tube head, and the inner gun tube is mounted at the tail part of the front sealing base in a threaded connecting way; the valve trim assembly is mounted in the front sealing base; the inner gun tube is connected to the tail part of the front sealing base; the connecting rod is connected to the tail partof the inner gun tube in an insertion pin connecting way; the outer gun tube connecting plate is fixedly mounted on the outer gun tube head through a screw; and an external pipeline and the front sealing base are in fastening connection detachably through a force applying strip assembly and a locking assembly. The manual liquid adding gun is reasonable in design, is simple in structure, is practical and convenient, and is