Building material decomposition smoke density testing machine

The utility model relates to a building material decomposition smoke density testing machine which comprises a combustion box, the combustion box is provided with a detection device used for detecting smoke, a bracket and a flame spray gun used for combusting a detected material are arranged in the combustion box, and the bracket comprises a first erecting frame, a second erecting frame and a fixing rod. The first erecting frame is located above the second erecting frame, the first erecting frame and the second erecting frame are both connected to the fixing rod, the fixing rod is fixedly connected to the combustion box, the first erecting frame is detachably connected with a combustion pad net, and the second erecting frame is detachably connected with an ash collecting hopper used for receiving carbon ash. According to the utility model, the possibility that carbon ash generated after combustion of a detected material is scattered in the combustion box can be reduced. 本申请涉及一种建筑材料分解烟密度试验机，其包括燃烧箱，所述燃烧箱设置有用于检测