Abstract: Absrtact:This paper analyzes the hidden trouble of 10 kV switchgear in the switch station by using the state detection technology, and in view of the state detection of the important station room in the key safeguard task, the hidden trouble equipment is found out and the power-off maintenance is put forward, and the development of hidden trouble is restrained in advance. The important support tasks are completed satisfactorily, the state detection flow in the key support tasks is summarized, and the existing problems of state detection and solutions are pointed out.