The utility model belongs to the technical field of power equipment and an anti -electricity -stealing interlocker for ammeter is disclosed, including electronic box, chamber door, ammeter and interlocker, the electronic box passes through the hinge and is connected with the chamber door, the hinge is two, install the fixed screw on the hinge, the fixed screw is two, the case door is provided with an observation window, the observation window is made by clear glass, magnetic switch is all installed to electronic box and chamber door one side, electronic box one side is equipped with and connects the electricity mouth, the ammeter with the interlocker is all installed in the electronic box, the interlocker includes current metering ware, current controller, data processing device, memory and filching detection ware. The utility model discloses because the current metering ware, can detect electric meter recorded's electric quantity, be favorable to the filching detection ware to judge whether someone steals electric action, owing to the memory, can store electric meter recorded's electric quantity to study it in the staff.