A method of solving spatial distribution of shell density by inverse Abel transform is presented. CH sphere imaging on the micro-focus X-ray source is implanted to test the method of inverse Abel transform. The reversion of shell density is in agreement with real density, which verifies the correctness of the method. The 16-fram implosion target images are processed by inverse Abel transform, and the distributions of compressed shell density at different times are obtained. Qualitative analysis of back-lighter distribution, pinhole imaging and variation of shell thickness is proposed for inverse Abel transform.