Abstract: For the analysis of on-orbit anomalies and failures of the satellite solar arrays and their reliabilities, 114 sets of satellite in-orbit solar array anomalies and failures between January 2000 and September 2012 are studied, and of particular interest is the Kaplan-Meier estimator of on-orbit solar array failures of GEO satellites. The following results are obtained: the most frequently happened failures are the SAO failures; the number of GEO satellite failures are the largest; the first year in the orbit is the failure season; the electrical failures are the commonest; the system fault or the common problems of certain satellite buses could be involved. Some suggestions are made to improve the simulation model, the validation test before delivery or the redundancy design, which may help to improve the reliability of satellite solar arrays.