Abstract: Foamed ceramics are prepared from coal gangue by high temperature melting method.The influence of sintering system on compressive strength, bulk density and thermal conductivity of foamed ceramics is studied by means of range analysis and variance analysis, and the optimal sintering system is obtained by comprehensive analysis.The results show that sintering temperature, preheating temperature, preheating time and sintering time are the most important sintering parameters which affect the compressive strength and bulk density of foamed ceramics; the sintering system parameters which influence the thermal conductivity of foamed ceramics from large to small are sintering temperature, sintering time, preheating temperature and preheating sintering.The optimal sintering process is preheating temperature 550 ℃, preheating time 20 min, sintering temperature 1 150 ℃ and sintering time 80 min.The compressive strength, bulk density and thermal conductivity of the foamed ceramics prepared under this sintering process are 5.13 MPa, 461 kg/m³ and 0.184 W/(m·℃), which meet the requirements of foamed ceramic partition board (T/CBCSA 12—2019)when the density of the foamed ceramics ranges from 420 kg/m³ to 480 kg/m³ product standards.The research results provide an effective reference for the comprehensive utilization of coal gangue in China.