The modulation of vortex light field is essential for the application of vortex light in laser communication, biological manipulation and other fields. Based on Fresnel diffraction theory, we numerically simulate the intensity, phase and spiral spectrum distribution of Laguerre-Gaussian (LG) beams focus field with various lens spherical aberration coefficients in order to reveal the aberration effect on the propagation characteristic of LG vortex beams. The results show that the increase of the primary spherical aberration coefficient of the optical system deteriorates the intensity distribution and spiral phase of LG beam focus field, and disperses the orbital angular momentum (OAM). Therefore, the aperture compensation scheme is proposed, in which the lens aberration is eliminated by placing an appropriate-size circular aperture in front of a lens. After the aperture compensation, the focus field of the LG beam is restored from the star-shaped hollow distribution to the hollow ring distribution, and the OAM state remains single and stable. This work provides a method for improving the lens aberration on vortex light transmission effect.