The utility model provides a novel energy -efficient environmental protection gasifier, this gasifier include that inside cavity, bottom are the stove body of certain gradient, and one side bottom of this stove body is equipped with the air -blower, and this air -blower links again has a plurality of intake pipe no. 1, and the top of stove body is equipped with the feed inlet, the comburant ( -rent) from the hopper under the effect of power conveyer through the screw conveying pipe way by the feed inlet is carried to the stove body inside, the opposite side of stove body still is equipped with the lighting -up tuyere, and this lighting -up tuyere is close to the feed inlet, and with an intake pipe homonymy, the stove body is equipped with the gas mouth, and it lies in equally the homonymy of intake pipe no. 1. The utility model discloses the structure setting is comparatively simple, and inner structure is also uncomplicated, and but unexpected is good for the combustion efficiency that finally obtains, does not almost have the smoke and dust granule in the burning gas, and afocal oil produces, can turn into burning gas with the straw effectively, and the utilization ratio is high, and the installation cost is lower, is suitable for popularization and application.