In view of the current increasing demand for the destruction and disposal of waste ammunition, based on the green disposal requirements of ammunition, the physical characteristics of common ammunition charges are analyzed, and the methods of charge emptying are summarized and classified based on the characteristics of the charges. The principle, technology and characteristics of 7 charge emptying methods are compared and analyzed, and an evaluation system for the emptying method of projectile charge is proposed. It is pointed out that the electromagnetic induction heating emptying method will become the main development direction of charge emptying in the future. This analysis has great significance for improving the current disposal situation of waste ammunition in our country and realizing safe, green and efficient disposal.