The invention relates to equipment for overhauling an electronic gun in a nuclear radiation environment. The equipment comprises an electronic control system, an overhauling platform, trolley runningtracks, an easily damaged part replacing device, an electronic gun transit trolley, the electronic gun, a high voltage interface module and a low voltage interface module, wherein the trolley runningtrack positioned at the rear side of a table of the overhauling platform has a straight track structure, and a rack is also arranged on a top track surface of the trolley running track positioned at the front side of the table of the overhauling platform; the electronic gun transit trolley is used for transiting the electronic gun and runs on the trolley running tracks; the electronic gun transittrolley comprises a trolley main body, a spring pressure switch, a trolley motor, a spring accumulator, a transmission mechanism, driving wheels, driven wheels and a motor-free end S-pole permanent magnet. The equipment for overhauling the electronic gun in the nuclear radiation environment is reasonable and compact in structural design, and can work in the nuclear radiation environment; especially, the electronic gun transit trolley is safe and stable in operation, complete in functions and high in reliability, and has a complete working mechanism.