The utility model relates to a continuous pyrolyzing furnace and pyrolyzing system for biomass, the shell of the continuous pyrolyzing furnace is provided with a hot air source inlet, a chimney and a feed hopper; the continuous pyrolyzing furnace with built-in shell comprises at least a set of heating conveying auger comprising at least three augers in vertical arrangement, each auger is positioned at an auger branch cylinder, and the two ends of the auger can be positioned at the shell rotatably, the auger branch cylinder at the top is provided with a feeding hole for communicating with the feed hopper, the three auger branch cylinders are communicated through a feed opening in the method of connecting the front with the back, the auger branch cylinder at the last stage is provided with a feed opening for communicating with a discharge device, and the auger branch cylinder is provided with gas collecting tube and is collected in a gas exit tube. The auger branch cylinder of the continuous pyrolyzing furnace is provided with the gas connecting tube and is collected in the gas exit tube, a hot gas line of the burner is connected with the hot air source inlet of the continuous pyrolyzing furnace, and a feeding device is connected with the feed hopper. The utility model can implement continuous pyrolysis to the biomass, thereby gas or carbon can be produced.