Flame-retardant testing device for preparing high-strength flame-retardant plastic steel profile

The utility model discloses a flame-retardant testing device for preparing a high-strength flame-retardant plastic steel profile, and relates to the technical field related to material detection. The material pushing device comprises supporting plates, a bearing plate, a fixing seat and a material pushing frame, clamping plates are fixed to the sides, close to each other, of one sides of the bottoms of the two supporting plates, a fire-resistant heat-conducting fin is fixed to the upper portion in the bearing plate, and a cavity is formed in the supporting plate at the bottom of the fire-resistant heat-conducting fin; the fixed seat is connected with a spray head through a gas conveying pipe, the spray head corresponds to the fireproof heat-conducting fin in position up and down, and a push block is movably connected between the two supporting plates and the clamping plate. According to the flame-retardant testing device for preparing the high-strength flame-retardant plastic steel profile, the supporting pla