The invention relates to a fast pyrolytic test device, which consists of a tubular electric heating furnace (6), an object carrying frame (11), a temperature test and control opening (8), a reaction tube (4), an air inlet opening (1) and an oil air outlet opening (9). The invention is characterized in that the air inlet opening (1) is arranged at the upper part of the reaction tube (4), the top of the reaction tube (4) is provided with an adjustable sealing element (3), a stainless steel rod (5) is arranged in the reaction tube (4), the top end of the stainless steel rod (5) is connected with the adjustable sealing element (3), the lower end of the stainless steel rod (5) is connected with a sample hanging basket (7), the middle lower part of the reaction tube (4) is positioned inside the tubular electric heating furnace (6), the bottom of the reaction tube (4) is provided with the temperature test and control opening (8) and the conical oil air outlet opening (9), the conical oil air outlet opening (9) is connected with an oil air outlet tube (12), and the tubular electric heating furnace (6) is positioned on the object carrying frame (11). The invention has the advantages of high performance price ratio, simple and convenient operation, simple structure and low equipment cost, can realize slow temperature rise and fast pyrolysis under the condition of simulated work conditions, can realize fast cooling, and can accurately measure the tar amount generated by the pyrolysis.