Energy-saving injection molding machine

The utility model discloses an energy-saving injection molding machine, and relates to the technical field of injection molding machines, the energy-saving injection molding machine comprises an injection molding pipe with one sealed end, the opening end of the injection molding pipe is fixedly connected with an injection molding nozzle, an injection molding device is installed in an inner cavity of the injection molding pipe, and the upper surface of the injection molding pipe is fixedly connected with a hopper. Through cooperative arrangement of the negative pressure pipe, the air conveying channel, the air inlet hole, the draught fan and other structures, a user can start the draught fan to convey heated air in the air conveying channel into the hopper through the negative pressure pipe and a communicating hole while materials in the injection molding pipe are heated through an electric heating wire, and the remaining materials in the hopper are dried and preheated; according to the injection molding machi