Abstract: Abstract: Adaptive optics has played an important role in high resolution telescope. The low order aberrations of the telescope can be completely compensated by adaptive optics, but it causes the loss of the compensation stroke of the deformable mirror. The middle and high order aberrations after compensating of the deformable mirror have some residual aberration, so we need control the residual aberration to ensure high resolution imaging quality, especially the high order residual aberration that can't be compensated, which should be strictly controlled in the beginning of the design of the telescope system. This paper analyzes the structure of primary mirror of the telescope optical system, secondary mirror block, secondary mirror support bars block, the primary mirror and secondary mirror alignment, and the static and quasi-static aberration of the optical machining. The influence of these factors on the adaptive optics compensation is analyzed, and the requirements of the aberration control are given.