An oil-immersed transform cooling device

The invention relates to the technical field of transformers, in particular to an oil-immersed transformer cooling device, comprising: an oil tank, a cooling fin, a base, an oil pump, a temperature sensor, a controller, an auxiliary oil tank, an oil outlet valve, an oil inlet column and a filter screen; the auxiliary oil tank is located on a side face of the oil tank of the transformer, the bottomof the auxiliary oil tank is fixedly connected with the base, the auxiliary oil tank clings to the cooling fin of the transformer, and an elastic air bag is arranged inside the auxiliary oil tank; the oil inlet valve is located at the top end of the auxiliary oil tank, the oil inlet column is hollow and communicates with the inner and outer walls of the transformer oil tank, the bottom end of theoil inlet column is located in the transformer oil tank, the top end of the oil inlet column is located outside the transformer oil tank, and a second connecting port is arranged in the side wall ofthe top end of the oil inle