The invention discloses a moving protecting device for a fusion device and belongs to the technical field of a secret-related medium destroying device. The moving protecting device comprises a protecting cover, a longitudinal moving mechanism, a guiding mechanism and a horizontal moving mechanism, wherein a rear plate, a base plate and two lateral plates are encircled into the protecting cover; the longitudinal moving mechanism comprises a screw rod and a fusion device bracket; the screw rod is arranged on the inner side of the rear plate along a longitudinal direction; a rotating handle is arranged on an upper end part of the screw rod; the fusion device bracket is arranged in the protecting cover and is in linking connection with the screw rod through a thread; the guiding mechanism comprises a guiding rod which is arranged on the inner side of the rear plate along the longitudinal direction; the fusion device bracket is equipped with a guide rod slot which is in sliding limiting fit with the guiding rod; the horizontal moving mechanism comprises a fusion device tray; the fusion device bracket is equipped with a guide rail which is formed by extending back to the rear plate; and the fusion device tray is limited in the guide rail in a sliding form. An operator can utilize the moving protecting device to clamp and move a high-temperature fusion device without manual operation in the whole process of medium destroying, so that the operation safety of the medium destroying can be promoted.