In attitude guidance picture of the cockpit display system, distortion and flickering may occur to the numerical value of pitching angle and the triangle indicating the angle of inclination in rotation and translation.To solve the problem, reverse mapping method of bilinear interpolation was used for image rotation and translation.Visual C++ was used in the PC Windows environment for simulation.Comparison was made to the attitude pictures before and after the processing of interpolation algorithm.Experimental results showed that the algorithm can effectively restrain the distortion and flickering of attitude display in rotation and translation.