The invention discloses an automatic insert injection molding machine. The automatic insert injection molding machine comprises an injection molding machine body and is characterized in that the injection molding machine body comprises a machine frame; a movable arm is connected to the machine frame, and a taking and placing mechanism and a waste clamping mechanism are connected to the movable arm; a feeding mechanism is further arranged on one side of the injection molding machine body and comprises a vibrating tray used for screening materials and a candidate collecting mechanism used for storing an insert temporarily; the taking and placing mechanism is provided with a grabbing assembly and an adsorbing assembly and used for grabbing the insert on the candidate collecting mechanism and adsorbing and taking out a finished injection molded product. The waste clamping mechanism is used for clamping waste generated during injection molding of the insert. According to the automatic insert injection molding machine, automatic feeding and collecting are achieved, automatic machining is completed, risks and a high error rate of manual operation are avoided, and damage to a die is reduced; in addition, the quality of products is guaranteed and made uniform, production efficiency is greatly improved, labor is reduced, and cost is reduced.