High voltage circuit breakers are one of the key electrical equipment in power systems which aseismic capacity is weak.Firstly

survey and analysis on earthquake disaster of circuit breakers in 5.12 Wenchuan earthquake are carried on.In addition

acceleration and stress response of SF6 circuit breaker

subjected by varied earthquake wave in shaking table testing.As is shown that damage of circuit breakers is severe in the above Ⅶ level（earthquake intensity） region.Generally

there are four types of typical damage.It is essential that some effective aseismic measures are adopted to improving aseismic capacity for circuit breakers.There are two methods to enhance circuit breaker aseismic capacity

one is conventional aseismic technology

another is isolation and damping technology which have obvious advantages for the distinct principle and notable efficiency.Finally

considering to structural feature

the three suitable schemes on isolation and damping technology of circuit breaker are put forward.This research has some certain reference to aseismic design and reinforcement of circuit breaker electrical equipment.