Cooling device applied to power equipment and using method

The invention provides a cooling device applied to power equipment and a using method, the cooling device comprises a first connecting pipe and a second connecting pipe, the surface of the first connecting pipe is communicated with an oil inlet pipe, the bottom of the second connecting pipe is communicated with an oil outlet pipe, and a plurality of reinforcing ribs are welded to one side of the first connecting pipe and one side of the second connecting pipe; two hanging rings are welded to the top of each of the first connecting pipe and the second connecting pipe, and a heat dissipation assembly is arranged between the first connecting pipe and the second connecting pipe; through mutual cooperation of the first connecting pipe, the second connecting pipe, the cooling fins, the u-shaped cooling pipe, the cooling fan and the spoiler, high-temperature cooling oil generated by a power load in the whole power transformer can be rapidly cooled, and the high-temperature cooling oil circulates in the transformer o