The invention relates to a power distribution network outdoor cabinet antitheft system belonging to the power distribution network safety monitoring technology field. The power distribution network outdoor cabinet antitheft system comprises a button module, a CPU module, an alarming module, and a power supply module. The button module comprises an induction button of an induction cabinet door switch, which is disposed on an inner side of a cabinet door. The alarming module comprises a GPRS wireless communication chip and an alarming device. The power supply module is an external power supply, and is used to supply the various modules with working power supply. The power distribution network outdoor cabinet antitheft system is advantageous in that on one hand, the alarming device is used to give alarms, and then lawbreakers are awed, and crimes are prevented; on the other hand, alarming short messages are sent to cell phones of power distribution cabinet operation maintenance staffs the first time, and then the operation maintenance staffs can arrive at the scene as soon as possible to handle accidents, and then damages caused by the accidents are minimized, and corresponding outdoor cabinet door opening records are queried by short message records.