The invention discloses a speed-adjustable anesthesia breathing mask, comprising a clamping joint, a breathing mask body and a speed controller, wherein two sides of the breathing mask body are provided with elastic band, one end of one elastic band is provided with a buckle, one side of the buckle is provided with a clamping slot, a breathing hole is arranged in the surface of the breathing maskbody, an oxygen tube is arranged at one side of the breathing hole, a spray head is arranged at the inner side of the breathing mask body, one side of the spray head is provided with a clamping groove, and two sides of the surface of the clamping groove are provided with buttons. By inserting a clamping connector into the clamping groove, a first spring ejects a clamping block and the clamping block is clamped with a position groove, so fixing is carried out. A hypnotic gas enters a plastic tube through a hose and then is sprayed out by the spray head to perform hypnosis, and a sealing ring prevents gas leakage. When disassembling is needed, the buttons are pressed, and a second spring squeezes a movable plate to enable the clamping connector to be ejected out through squeezing of the buttons on the clamping block, thus a connecting tube can be conveniently dismounted and mounted, and the working efficiency is improved.