Sepuri's anti-condensation device is developed according to the dehumidification treatment of humid air accumulated in the electrical cabinet for a long time. According to the design principle of small size and portable installation, it adopts modular structure design. The dehumidification method adopts semiconductor refrigeration technology, which reduces the relative humidity in the cabinet by creating condensation conditions locally and directly discharges condensed water. The power supply of the device is also provided by AC-DC wide-range switching power supply module, which can ensure the normal operation of the device at low ambient temperature. The installation principle is that within the safe insulation distance, the middle and lower part of the cabinet wall is opposite to the heater, and the power supply and power supply are convenient to lay. The problem of condensate water drainage, laying drainage pipes, can collect condensate water from all dehumidification devices and discharge it from outdoor PPR water pipes. Therefore, Sepuri's anti-condensation device can be used for dehumidification in the control cabinet.