Energy-picking device based on transformer

The invention provides an energy-picking device based on a transformer. The device is arranged between a transformer oil path pipeline and a cooling water pipeline and comprises heat exchangers and a thermoelectric conversion module, wherein the heat exchanges are respectively arranged on walls of the transformer oil path pipeline and the cooling water pipeline, periphery of the heat exchangers is provided with an insulation layer, a sealed space structure is formed between the insulation layer and the heat exchangers, the thermoelectric conversion module is arranged in the sealed space structure, and the thermoelectric conversion module generates electricity according to temperature difference between the transformer oil and the water. Compared with the prior art, through the energy-picking device, redundant heat of the transformer can not only be recycled and reused, but also heat load of the auxiliary cooling water equipment or the auxiliary cooling wind equipment of the transformer can be substantially reduced, and the energy-picking device has advantages of more compact structure and more reasonable layout.