The utility model discloses an anti-explosive plastic bag sealer. An electric heating bar is sealed and sheathed on a special-shaped heating pipe, working medium is filled in the special-shaped heating pipe, the upper end of a hot resistance on a temperature control meter floats on the surface of the special-shaped heating pipe, a conductive wire protective pipe is connected between the temperature control meter and the special-shaped heating pipe, and the electric heating bar is arranged in the special-shaped heating pipe. A hot protector is connected in an electric heating bar conductive wire circuit in series, the special-shaped heating pipe and the conductive wire protective pipe are connected by an anti-explosive pipe joint, and an anti-explosive casing is arranged on the outside of the temperature control meter. The whole device has strong anti-explosive performance, and is safe for being used for sealing explosive and powder plastic bags. The explosive danger is avoided, and the power consumption and the heat source size are reduced.