Underwater carbon dioxide expansion rock breaking fracturing device

The invention relates to the technical field of ocean engineering equipment blasting, in particular to an underwater carbon dioxide expansion rock breaking fracturing device which comprises a fracturing pipe, an upper plug cover, a lower plug cover, an excitation pipe, a conductive film, two conductive wires, two conductive connecting plates, a plug connector, a power source, a control panel and an antenna, and the upper plug cover and the lower plug cover are arranged at the two ends of the fracturing pipe. A fracturing groove is formed in the inner wall of the fracturing pipe, and the excitation pipe is arranged in the fracturing pipe. The control panel is provided with a controller, a positioning module, a label storage module and a communication module. A conductive film is arranged at the cracking groove to serve as a blasting triggering judgment condition, when the cracking device carries out blasting, the carbon dioxide liquid absorbs heat and expands, the conductive film deforms during expansion crack