Multi-functional protective fire-preventing highly effective fire gun

A multi-functional protective fire-preventing highly effective fire gun consists of a squirt body, a B washer, a water spray umbrella adjuster, an A washer and a spray head, wherein the external thread of the back end interface of the squirt body is connected with the internal thread of a squirt seat connected with a hose joint. Between the squirt body and the spray head is arranged the water spray umbrella adjuster, of which the internal thread is connected with the external thread of a pipe body connecting the squirt body and the spray head. The middle pipe body connecting the squirt body and the spray head is provided with water pores which can be circular, square or rectangular and number from three to twenty. The water spray umbrella adjuster arranged onto the external thread of front end pipe body of the squirt body is in contact with the back end interface surface of the spray head, and fire water spurts forward through the squirt body cavity and the spray head. The water spray umbrella adjuster can be rotated reversely to separate the front end face of the water spray umbrella adjustor from the back end interface surface of the spray head and expose the water pores on the squirt body. In this way, fire water can not only spurt forward through the squirt body cavity and the spray head, but also simultaneously spurt around the squirt body through the water pores on the joint between the front end pipe body of the squirt body and the spray head, thereby forming a fire blocking water curtain between fire and a fireman and having a high-efficiency fire fighting effect with body protection and fire blocking provided for the fireman.