The utility model discloses a forced charging machine for continuously mixing materials. The forced charging machine comprises a charging container and a speed reducer, wherein the charging container is communicated in the radial direction; the speed reducer is driven by a motor (1); a feeding spiral shaft (15), which is connected with a rotary shaft of the speed reducer, is vertically and fixedly connected with an anti-bridging stirring blade (5); the tapered end head of the feeding spiral shaft vertically extends to a feeding port (16) of a spiral former (9); and a feeding spiral rotary-extrusion charger (6), which consist of upper, middle and lower layers of feeding spiral rotary-extrusion blades of different structures, is arranged at the periphery of the rod body at the tapered end head of feeding spiral shaft; diffluent troughs (21) with radial openings are formed on the middle layer of the spiral blades (19); and the upper layer and the lower layer of spiral blades are continuous spiral blades. The open diffluent troughs (21) of the middle layer of the spiral blades (19) are used for upwards returning part of the materials through the openings of the blade diffluent troughs, so that the materials are exhausted and distributed; and the lower layer of the continuous spiral blades are used for continuously charging materials to the charging port of a screw press. According to the forced charging machine disclosed by the utility model, materials are uniformly, safely and stably added to the screw press without being clustered and blocked, so that the charging is uniform. Besides, the quality stability during the forming process of the mixed grease blasting explosive is improved.