The laws of war have general laws and special laws. The general law of war is the most stable and universal internal essential connection in the process of various war movements. It exists in all wars and all stages of wars and plays a role in any war. The emergence and development of war is rooted in the contradictory movement of social productive forces and production relations; The evolution of war forms depends on the development and change of social and historical conditions; The elimination of war depends on the complete elimination of private ownership and class in human society; War is the continuation of political violence and the highest form of class struggle and political struggle; Political purpose determines the nature of war; War depends on social and economic conditions and the development level of production, science and technology; The purpose of war is to destroy the enemy and preserve their own unity; The victory or defeat of the war depends on the strength comparison and growth and decline of the two sides of the war. Knowing the general laws of war, we can understand the general nature and development trend of war and provide general guidance and foresight for war practice. The special law of war refers to the inherent and inevitable essential connection in the process of a specific war movement.