To further promote the industrial application of coal pyrolysis classification conversion polygeneration technology and achieve the clean and efficient resource utilization of coal，the evolution behavior of volatile products and the components distribution of volatile products during coal pyrolysis in a 1 MW demonstration multi-generation facility were investigated.Through the combination of experimental research and theoretical analysis in this paper.The effects of pyrolysis temperature and coal type on the fuel gas yield,tar oil yield,components distribution and heat value of fuel gas were also revealed. The synergistic operation characteristics between pyrolysis reactor and combustion reactor were elucidated during these experimental tests. Based on the data collected from the 1 MW multi-generation system operation a 50 MW CFB multi-generation device which integrated the coal pyrolysis,gasification,combustion,synthesis and other processes into a whole unity was designed to provide theoretic guidance for commercial application of the coal multi-generation technology. The experimental results show that the concentration of main components of CH₄ and H₂ in fuel gas is 41.97% and 28.32% respectively. Under design conditions the yield of tar and fuel gas is 3.16 t/h and 35 262 Nm³/h. The fuel gas heat value is high to 26.7 MJ/Nm³. The high tar recovery rate is above 90%,which realizes high gas calorific value and tar recovery,and provides reference guidance for the industrial application of coal pyrolysis classification conversion polygeneration technology.