The utility model provides a can protect quiet device that explodes of liquid carbon dioxide who splashes, including the detonating ware of guard plate, support frame and liquid carbon dioxide, the guard plate sets up draw -in groove and detonating ware pilot hole, and the support frame sets up the joint tip and is used for supporting the toper stiff end on ground, and guard plate and support frame pass through the draw -in groove to be connected with the cooperation of joint tip, and the detonating ware of liquid carbon dioxide is installed in detonating ware pilot hole. The utility model discloses a static blasting is realized to the detonating ware of liquid carbon dioxide, can be used to the weak surrounding rock region, avoids country rock large tracts of land collapse, and the guardplate can effectively prevent to blow up the rock block that the in -process launched and lead to the fact irreversible injury to tunnel structure such as median septums, uses the support frame to support the guard plate, makes the guard plate can press close to to need the face of blasting on request.