Non-null testing methods of optical aspheric surface are more common than the null testing ones. The mechanism of the production of retrace error in aspheric non-null testing are analyzed in detail. The retrace error is divided into predictable part and unpredictable part by combing calibration method and its influence on final testing result is analyzed. The principle of common retrace error calibration method in actual testing is introduced. The correction effects of each method on aspheric surface under test with different asphericities and different surface errors are compared by simulation experiment. The correction ability of retrace error of each method is analyzed by combing the method principle and simulation result, and the application range is summarized.