In the past five years

the qualification rate of national quality supervision and spot checks of the distribution arresters has steadily increased while the sampling rate of the products has decreased obviously.In order to improve the sampling rate to guarantee random samples have cover enough

this paper put forward a new idea of sampling method.In this paper

by analyzing some problems which exposed from the current sampling process

such as it is difficult to sample resistors

resistance samples do not agree with actual resistors which are in the arrester and the high current impulse withstand test equivalence.The new method suggest that sampling the whole arresters as samples in the product market only

and contact the products manufacturer to confirm the samples are exactly their qualified products

and all test items are on the whole arrester.The applicability of the new sampling method is analyzed from the necessity

feasibility and the expected impact.The new sampling method can increase the flexibility of sampling and improve the sampling rate

which can also investigate in the field of circulation of fake products

the high current impulse withstand test on the whole arrester（the high current amplitude need to argue） will decrease the pass rate of the arresters

but this way can stimulate the manufacturer strict control their product quality

guide the manufacturer from unreasonable low cost competition

for the long-term health of the industry development has a positive role.