The invention discloses a four-rotor aircraft rolling action realization method and device. The device comprises a main control chip, a motor, an inertial measurement unit and a PID control module. The main control chip is an STM32F3 series single-chip microcomputer; the motor is a brushless motor; the PID control module adopts cascade PID control; and the inertial measurement unit is an MPU6050 chip, and is connected to an electronic compass. A gyroscope and an angular velocity sensor are assisted to verify and correct attitude data by means of the electronic compass; fusion calculation is carried out on peripheral data in the inertial measurement unit through multiple sensors; then, the attitude data obtained through calculation is sent to the main control chip; the main control chip realizes control of the motor according to the attitude data, and realizes control of rotation speed of each rotor, and meanwhile, sends the attitude data to the cascade PID control system; and the cascade PID control system assists operators to realize self-stabilization of an aircraft, and finish rolling in the design. The four-rotor aircraft rolling action realization method and device can realize the rolling action of the four-rotor aircraft and has a wide practical application value.