The utility model relates to an automatic cutting anti-blocking stemming machine. The stemming cutting device is composed of a digital control panel, a power switch, a cable, a stemming cutting devicebody, an up-down sliding rod, a cutting steel wire, a discharging port, a conveying auger, a stemming outlet, a stemming sliding groove, a stemming collecting box and a motor. According to the automatic cutting anti-blocking stemming machine, the cutting speed of the stemming cutting device can be controlled through the power switch, the digital control panel and the cable; the stemming cutting device is composed of an up-down sliding rod and a cutting steel wire. The cutting steel wire is fixed to the uppermost end of the up-down sliding rod. Compared with a traditional stemming machine adopting large-caliber discharging, a large number of stemming materials can be placed into the discharging opening at a time, blocking is not likely to happen, stemming is output from the stemming outletunder the action of the material conveying auger, and produced and cut stemming slides into the stemming collecting box through the stemming sliding groove and then is packaged, collected and maintained in a unified mode.