Electric connectors are important components of electric devices and cables, and play the roles of energy supply and signal transduction. By studying the environment of the manned spacecraft,analyzing the mechanism of the dewing phenomenon and its impact on the electric connector, this paper proposes some electric connector protective measures. The performance of the electric connector test method for anti-condensation properties is studied in this paper. The experiment results show that the analysis is correct and the method is feasible.%电连接器作为设备和电缆网的组成部分，承担着能源传输、信息传递的功能，是重要的航天器元器件。文章通过对结露现象产生的机理及其对电连接器的影响分析，提出了电连接器的防结露措施，研究了电连接器防结露性能的试验方法和方案，并试验验证了分析的正确和试验方案的可行性。
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