Abstract: In the vertical random vibration test for the solar array of a small satellite, the excess tolerance in a high frequency is a serious issue. The analysis results show that the flowerpot fixture iS not suitable for the random vibration test and will lead to poor linking. Therefore, an auxiliary extending table is developed, which Can improve the linking. With respect to the auxiliary extending table, the fmite element analysis and the verification test were carried out. The comparison of analysis and test results show that the excess tolerance is greatly reduced.