Aiming at the problem that the index is different due to basic data conditions and the index weight is different due to diversity of user experience in GEO satellite frequency and orbit selection risk evaluation, a flexible risk evaluation method for GEO satellite frequency and orbit selection is proposed. Based on the fuzzy comprehensive evaluation method, the evaluation method supports user to configure flexibly from two aspects:index calculation mapping and weight configuration. For the difference of the index calculation mapping and weight configuration among users, a flexible construction method based on cluster analysis and normal distribution model autonomous learning is proposed. The construction method integrates the user's experienced knowledge to form the index mapping relationship and weight which most users approve, making the risk evaluation more scientific and rational. Based on the flexible risk evaluation method, the flexible evaluation system under the B/S was developed and effectiveness of the algorithm and the system is verified by actual cases.