The utility model discloses a steel sheet cold cut cutter, it includes the support, installs in the corruption pen of support, corrode the pen including the pen container that has the straight cartridge type inner chamber that can hold etchant solution, locate piston in the stopper or the lid of filler, inside locating the pen container of bottom nib of pen container, the filler of locating tip side under the pen container, shutoff, one end and hinge joint's flow control spring, the spring adjusting bolt who is connected with the flow control spring other end, spring adjusting bolt installs in the pen container top. It is that the corrosive liquid corrodes the metal and makes its material get rid of then realize the cutting to the metal to use etchant solution, and cutting process does not produce the spark can not lead to the burning explosion, is fit for in inflammable and explosive industry hazardous area operation. The flow of corrosive liquid can be controlled to the exhaust velocity of adjusting the corrosive liquid to control the degree of depth of corroding, and then adapt to the steel sheet cutting of different thickness, realize the steel sheet cold cut that does not receive the restriction of steel sheet cutting thickness and cut.