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Aiming to ensure the efficiency of ridge construction, reduce the labor intensity, and solve the problem that the manual control accuracy was not high and there was a large swing in the process of switching operation mode of the bi-directional ridger in paddy field, resulting in unstable rotation and unable to automatically lock. The whole structure and working principle were described. The motion model of the rotation adjustment device and the locking device was established, the angular acceleration range of the rotation process was determined to be 0.038~0.154rad/s2 and the rated output torque of the motor of the required electric push rod was 1.64~6.71N·m through kinematic and dynamic analysis. Based on the calculation of the moving speed of the electric putter, the relation curve between the elongation speed of the electric putter and the turning time was obtained and the steering control system was designed. According to the stress analysis of the lock pin, the maximum resistance of the lock pin to the soil was 18470N and the diameter of the lock pin was 10mm. The slewing performance test was conducted to record the slewing adjustment state of the chain drive box and compared with the theoretical motion state designed in a rotating cycle. The results showed that the mean square error of the whole rotation cycle was 1.01(°)2, the rotation adjustment process was consistent with the ideal motion process, and the control system had a high precision. Field operation performance test was conducted on the bi-directional ridger in paddy field. The test results showed that the average solidity of the ridge reached 1180kPa, and the rotation adjustment locking device was firmly locked, which did not affect the normal operation in the field.