Liquid carbon dioxide fracturing device considering jet flow direction and blasting method

The invention discloses a liquid carbon dioxide fracturing device considering a jet flow direction and a blasting method, belongs to the field of blasting engineering, and solves the problem of high application difficulty of chemical blasting construction. The fracturing device comprises a filling cavity, a pressure valve block and an inflation valve block are arranged at the two ends of the filling cavity respectively, a mounting pipe is arranged in the filling cavity, a heating pipe is arranged in the mounting pipe and connected with a heating device, and a notch groove is formed in the outer side wall of the filling cavity. The blasting method comprises the steps that the filling amount of liquid carbon dioxide is calculated, and the liquid carbon dioxide is filled into the column generator; a heating device of the cracking device is connected with an exploder; the cracking device is arranged in the blast hole, the notch groove faces the free face, and the blast hole is filled; and detonating is controlled