Low temperature environment is a kind of special working condition in the application of seals

which will affect performance of the seals and even cause seal failure. Therefore

it is quite necessary to study the low temperature performance of the seals. In this paper

the characteristic of the seals material is simulated by the test and analysis of several samples of the seals of the hydraulic operating mechanism of high voltage circuit breaker and with the the aid of computer aided engineering analysis（CAE）

and the simulation and analysis models of the seals are set up respectively. The simulation analysis is carried out under different temperature and working load conditions

and the low temperature operation ability of typical seals of hydraulic operating mechanism and the sealing effect of the seal products from different manufacturers are investigated. It is proved by the low temperature test and verification of the sample that the simulation analysis and test result are basically in agreement

which provides guidance and data support for the manufacture and application of seals and the improvement of reliability of hydraulic operating mechanism.