The invention relates to an injection molding device with a spherical rotor.The injection molding device comprises an injection oil cylinder, an injection seat frame, a motor, a transmission mechanism, a stand, an angular-contact bearing, a hopper, a
machine barrel, an electric heater, a movable oil cylinder, a gear and a
plunger.The injection molding device is characterized by further comprising the plasticizing rotor which comprises a hemispherical rotor body and a cylinder connected with the hemispherical rotor body into a whole, and a continuous outer threaded groove is formed in the hemispherical rotor body; the
machine barrel comprises a hemispherical plasticizing cavity and an injection
barrel, the hemispherical rotor body is located in the hemispherical plasticizing cavity and can rotate, the hopper is installed in the plasticizing cavity, the left end of the outer threaded groove is communicated with the hopper, and the right end of the outer threaded groove is communicated with the injection barrel; the
plunger is located on the hemispherical rotor body and in a central hole of the cylinder and the injection barrel and can axially move, a vibrating device is installed between the
plunger and a push rod of the injection oil cylinder, and the plunger is in clearance fit with the injection barrel.The injection molding device has the advantages of being high in plasticizing, smashing and squeezing capability, good in molded product quality and the like.