The invention discloses a stable plate perforating machine. The stable plate perforating machine comprises a main machine body and a guide slipper, wherein the guide slipper is arranged at the edge of the top of the main machine body; a liquid storage cavity is formed in the main machine body; a suction tube is arranged on the top of the liquid storage cavity; the bottom end of the suction tube is positioned at the bottom of the inside of the liquid storage cavity; a first shutoff valve is arranged in the suction tube; a piston cavity is formed in the main machine body and is positioned on the top of the liquid storage cavity; a piston is inserted in the piston cavity; a piston pin connecting column which penetrates through the main machine body is fixed in the center of the upper surface of the piston; the top of the piston pin connecting column is connected with one end of a control rod through a hinge; and the bottom of the middle of a body of the control rod is connected with a brace through a hinge. A principle of a hydraulic jack is utilized, environmental protection is facilitated, and the stable plate perforating machine is not affected by the environment when used, and is wide in use range. In addition, when reinforcing steel bars are bent by the device, labor intensity is reduced effectively.