Abstract: Some embodiments of the disclosure provide a spray gun and a car washer with the spray gun. The spray gun includes a spray gun housing and an operating handle, wherein the operating handle is provided on the spray gun housing. The spray gun further includes: a spray gun main body; a sealing assembly, at least a part of the sealing assembly being movably provided in the spray gun main body of the spray gun, and the operating handle being connected with the sealing assembly, so as to drive the sealing assembly to move by pulling the operating handle, so that the connection and disconnection of the fluid in the spray gun main body is controlled; and a locking switch, mounted on the spray gun housing in a position-adjustable manner, the locking switch being located on one side of the operating handle and cooperating with the operating handle in a limiting manner.