The utility model discloses a medical treatment ice bag undershirt, including the undershirt body and set up pocket, the area body on the undershirt body, the opening part that this pocket is used forholding ice bag and pocket is provided with and is used for locking an open -ended fastening components, the area body is provided with and is used for two fastening components of locking port bag inhuman back, the top layer of pocket is the waterproof cloth of contact ice bag for the cotton layer of contact skin, the nexine of pocket. The utility model discloses the undershirt can directly letthe patient dress at ice compress on one's body, more facilitates the use, can directly be directed against human back ice compress for the pocket of installation ice bag adopts cotton layer and waterproof cloth component pocket inner and outer structural, and internal waterproof cloth can prevent bag interior drop of water toward outer infiltration, and outside cotton layer can absorb the drop ofwater that the air liquefaction becomes, thereby avoids uncomfortable and feel and the wound infection as the part of contact skin.