The method, which wasused to manufacture and test concave aspheric surface with large speed aperture usingcollimator in the past years,has many shortcomings,such as low making precision and longperiod etc. Now using compensatory ways, we can get more accurate surface in a relativeshort time. And its precision can get λ/10 ～λ/20(rms).Through practice for a long time, it has been fully provedthat this method is feasible.