The invention provides a damp-proof type power transformation cabinet. The damp-proof type power transformation cabinet comprises a cabinet body, a ventilation module, a radiating module, and a control module, wherein a device for electric energy conversion and transmission is installed in the cabinet body, an air inlet and an air outlet are formed in the cabinet body, the ventilation module comprises a first fan, a second fan, a dehydrating breather, an air supply pipe and an air exhaust pipe, the radiating module is installed in the cabinet body and used for reducing temperatures in the cabinet body, the control module comprises a first humidity sensor, a second humidity sensor, an early warning unit and a control unit, and the control unit is respectively connected with the first humidity sensor, the second humidity sensor, the first fan, the second fan, the dehydrating breather and the early warning unit and controls the first fan, the second fan, the dehydrating breather, and the early warning unit to work according to detection data from the first humidity sensor and the second humidity sensor. The damp-proof type power transformation cabinet is capable of automatically dehumidifying the inside of the power transformation cabinet, preventing devices in the power transformation cabinet from being eroded by humidity, and guaranteeing work reliability.