Prefabricated insulating main body, cable outdoor terminal and electric locomotive

The utility model provides a prefabricated insulating main body, a cable outdoor terminal and an electric locomotive, and the prefabricated insulating main body comprises an insulating layer, a stresscone disposed in the insulating layer, and an insulating sleeve and an umbrella skirt which are successively disposed outside the insulating layer in a stacked manner. The prefabricated insulating body is of a structure that the insulating layer and the umbrella skirt are integrally formed on the basis of the insulating sleeve and the stress cone. Compared with the layered design in the prior art, the integrally-formed structure is adopted, the cable outdoor terminal has the advantages of being tighter in attachment, good in ageing resistance and wind resistance due to seamless connection, more uniform in electric field distribution and strong in insulation protection, and the service life of the cable outdoor terminal is effectively prolonged due to the good performance of the prefabricated insulation body. 本实用新