The invention discloses a lock protected against violent opening. The lock comprises a panel. The panel is provided with a spring bolt system and a transmission system. The transmission system is used for controlling popping out and contracting of the spring bolt system. The transmission system comprises a lock piece, a stirring gear and a motor. The stirring gear is connected with the lock piece. The motor is connected with a pin column A, and the motor can control popping out and contracting of the pin column A. The lock piece comprises a transmission column, a sleeve and a pin hole A. A transmission gear is arranged at one end of the transmission column, and the sleeve is connected in the transmission column in a sleeved manner. The pin hole A penetrates the side wall of the lock piece, the pin column A is connected in the pin hole A in a sleeved manner, and the stirring gear and the transmission gear are engaged. Even after the panel is destroyed through the violence means, unlocking through integral rotation of the lock piece cannot be achieved under the situation that the motor cannot be correctly started, the situation of violent destroying of the lock for unlocking is effectively avoided, and the lock is safer.