Plastic hot melting extrusion device

The utility model discloses a plastic hot melting extrusion device, which belongs to the field of shoe production, and comprises a mounting rack, a supporting mechanism and a hot pressing mechanism, the supporting mechanism comprises two limiting frames, the two limiting frames are both connected to a bottom plate of the mounting rack, and a first supporting frame and a second supporting frame are respectively mounted on the two limiting frames in a sliding manner; by arranging the supporting mechanism, by means of the sliding capacity of the first supporting frame and the second supporting frame and shape matching of a first base plate and a second base plate, vamps of different sizes can be supported, bonding between the vamps and shoe soles is facilitated, and the sliding range of the first supporting frame and the second supporting frame can be limited through position matching of sliding grooves and fixing bolts; the positions of the first supporting frame and the second supporting frame can be fixed by