For ensuring reliable and effective recycle of energetic propellant shell substandard product, increasing shell utilization and reducing production cost of enterprise, research on automatic separation technology of energetic propellant shell with TH and THL in it. The paper introduces the safe and automatic separation technology process flow, research on safe melting temperature, thermal decomposition temperature, air explosion temperature and anti-pressure intensity, hit sensitivity, and density. Carry out data collection and remote monitoring for key safe security which influencing on shell separation performance. The results show that the method can realize safe and automatic separation for high solid cast explosive and improve waste recycle efficiency, reduce environment pollution and avoid personal injury.