Aiming at the steering control accuracy problem of electromagnetic navigation inspection robot, a steering control strategy based on weighting sensor data fusion is brought forward. In order to accurately calculate the turning Angle of inspection robot, the eight sensors symmetrical distributed on the mechanical mechanism are used to test the signal, and obtains deviating position between the navigation line and inspection robot, weighting coefficient calculation process and the position of steering angle relationship curve are provided. The scheme is low computational complexity and easy to control and suitable for applying in microcontroller