The invention provides a fully electric super speed injection molding machine, which is mainly composed of a mold closing device, an injection device and a support. The mold closing device and the injection device are placed on the support; the injection device consists of a nozzle, a machine barrel, a heating ring, a threaded rod, a loading hopper, a hopper seat, a hopper seat moving unit, a plasticizing unit, an injection ball screw, a high speed brake unit, two injection motors and an injection platform; the plasticizing unit comprises a linkage support plate, a plasticizing motor, a plasticizing toothed timing belt and a belt wheel; the high speed brake unit comprises a caliper support plate, brake calipers, a brake disc, a bearing end cap, a transmission shaft, a deep groove ball bearing, a thrust bearing, an injection toothed timing belt and a belt wheel; and the injection servo motors provide driving power for the high speed break unit. Compared with the prior art, the injection molding machine does not need high power linear motor drive injection, equipment cost is greatly reduced, the machine has the advantages of being high in responsiveness, energy saving and environment-friendly, and the like, and solves problems that hydraulic super speed injection molding machine is large in energy consumption, difficult to speed up, and the like.