The invention discloses an electric-controllable combustion solid propellant based on perchlorate and a preparation method thereof. By weight, the electric-controllable solid propellant is prepared by the following raw materials: 35-90 parts of an oxidant, 10-30 parts of an adhesive, 0.1-2 parts of a cross-linking agent, 0.2-10 parts of a plasticizer and 5-20 parts of a metal fuel, wherein the oxidant is the perchlorate. The electric-controllable solid propellant has the better air humidity stability and high-temperature resistance, the difficulty of the preparation technology is low, the preparation process is simple, the operation is easy, and the safety coefficient is high.