The slogan "All political power belongs to the Soviet Union" was put forward by Lenin in the Outline of April. The background at that time was that after the February Revolution, two regimes coexisted, and the interim government held actual power. In Russia, engineers represent the Soviet Union and the bourgeois provisional government. The former has established its own armed forces, while the latter has actual power. Where the revolution goes and what route, principles and strategies the Bolshevik Party should adopt are related to the future and destiny of the revolution. In this case, Lenin put forward the slogan "All political power belongs to the Soviet Union", which guided the direction. Why was Lenin's idea that "all political power belongs to the Soviet Union" considered "seemingly absurd" at that time? This is because, after the February Revolution, the provisional government held actual power, while the Soviet Union was at a disadvantage in the situation.