In order to ensure the adjustment range of the optical zoom digital surveillance camera’s zoom and focus stepper motors, a correction method based on zoom tracking curve is designed. First, select a standard curve from the zoom tracking curve manufacturers provided. Second, the real zoom tracking curve with the same distance of the standard curve is collected by the method of automatic focusing. Then, offset of the highest points in two curves is calculated. Finally, with the principle of minimum squared difference, optimal offset value is found in a small area near the offset. This correction method is realized in high-definition digital video camera with 30× lens. Experiments show that this correction method is a good solution for solving the problems of stall phenomenon and out of focusing caused by motor origin error.