A replacement platform of an enclosed type switch cabinet mutual inductor comprises a base plate, a worm wheel, a worm rod, a rotary handle, a fixed plate, a driving rod, a support connecting rod, a support panel, a fixed strip, a lock buckle, a support frame and a ground wheel, wherein the fixed plate is arranged at the back part of the base plate, the worm wheel is arranged at the front part of the fixed plate, the worm rod meshed with the worm wheel is arranged at the middle part of the fixed plate, and the upper end of the worm rod is provided with the rotary handle. The driving rod extending forward is connected and arranged on the worm wheel, the front end of the driving rod is connected with the lower end of the support connecting rod, the upper end of the support connecting rod is connected with the undersurface of the support panel, and the periphery of the support panel is provided with the fixed strip. The portal-shaped support frame is arranged on the position on the front part of the base plate, which is slightly close to the back side, and the support frame is arranged to be a sleeve structure. A lock buckle is arranged on one side of the extra heavy pipe on the lower end of the support frame. The platform is simple in integral structure, is convenient to operate and use, can be suitable for the fixing of mutual inductors with various sizes through adjusting the length of the fixed strip, and can ensures the work safety of the workers due to firm fixture.