The inntion discloss a carbon dioxide blaster. The carbon dioxide blaster compris a push rod, a liquid storage pipe and an exhaust pipe, wherein the liquid storage pipe is internally proded with a liquid storage caty; the exhaust pipe is internally proided with an exhaust caity; exhaust holes are formed in the surface of the exhaust pipe and are communicated with the exhaust cy; the push rod is connected with the liquid storage pipe by a first connector; the liquid storage pipe is connected with the exhaust pipe by a econd connector; the first connector is proded with a heater; the scond connector is proided with a constant pressure shear piece; the constant pressure shear piece is arranged between the liquid storage city and the exhaust cay. The carbon dioxide blaster can oid the conditions that the push rod is sparated and ejected from a drill hole as well as is damaged and deforms, and facilitates recycling of a blast tube.