Mobile preheating and heat insulating device

The utility model discloses a mobile preheating and heat insulating device aiming to performing preheating and heat insulating to rack steel plates erected on a cutting machine assembly jig. The cutting machine assembly jig comprises a cutting machine and two cutting machine guide rails. The mobile preheating and heat insulating device comprises a frame, a heat insulating layer arranged in the frame, a heating piece arranged between the heat insulating layer and the frame, two device guide rails parallel to the cutting machine guide rails and arranged on the inner sides of the cutting machine guide rails, two running mechanisms disposed on the device guide rails, and a plurality of running wheels connected at the bottom of the frame. The running mechanisms are respectively connected to the outside of the frame and away from one end of the cutting machine. The frame is arranged on the device guide rails through the running wheels. The running mechanisms drive the frame which moves along the device guide rails