The invention discloses an automatic injection molding machine with multiple molds. The automatic injection molding machine comprises a supporting base, wherein the supporting base is fixedly provided with a first electric motor through a supporting frame, the output end of the first electric motor is fixedly connected with the non-telescopic end of a second electric push rod, and a mold turntable is arranged at the telescopic end of the second electric push rod; the other end of the supporting base is fixedly provided with a supporting table, a second electric motor is fixed on the supporting table, and the rotating end of the second electric motor is fixedly connected with one end of a first screw rod; one end of a glue melting cylinder is fixedly provided with a glue injection nozzle, and the glue injection nozzle is fixedly connected with a glue injection conveying pipe; an automatic discharging device is fixed at the upper end of the supporting table; and the bottom surface of the supporting base is fixedly provided with first electric push rods, and the end parts of the telescopic rods of the first electric push rods are provided with rollers. The automatic injection molding machine has the beneficial effects of being capable of casting different types of molds conveniently, high in working efficiency, convenient in operation, not prone to blocking, high in stability and high in automation degree.