The utility model relates to a FDM type 3D printer conical screw extrusion device, include servo motor, shaft coupling, thrust bearing, axle, key, feed cylinder, conical screw, extrude first device, backup pad, feeder hopper. On servo motor and feeder hopper were fixed in the backup pad, the servo motor output shaft passes through the shaft coupling to be connected with the upper end of axle, and the lower extreme of axle passes through the flange to be connected with conical screw, and in conical screw placed the feed cylinder in, on the feed cylinder was fixed in the backup pad, the feed cylinder lower extreme had been put and has been extruded first device, the feed cylinder is by outward to interior inoxidizing coating, insulating layer, zone of heating and the inner liner of being respectively, extruding first device and including thread bush and extrusion nozzle, the thread bush is connected through the screw thread with extrusion nozzle. The utility model provides a pair of the consumptive material extrusion device of FDM type 3D printer can use granule, powdered consumptive material, provides the great power of extruding, increases a silk speed and effective control extrusion capacity, improves and prints efficiency.