The application and suitable range of Arrhenius equation are discussed. The applicability of Arrhenius means in heterogeneous non-constant temperature system, thermal analysis and storage research of explosives are shown. The results show that the assumption that activation energy E and pre-exponential factor A change with temperature is approximate. If A and E don′t change seriously during the experimental temperature range, Arrhenius equation can be used. But it should be corrected if it′s used for extrapolation purpose. Moreover,corrected Arrhenius equation has different activation energy E and pre-exponential factor A at different temperature range. It was extrapolated by Bruceton manometer test results that the storage life of GI-920 explosive was 126.95 d,353.62 d,623.46 d and 1143.77 d respectively based on the decomposition extent of 1% at 90 ℃,80 ℃,70 ℃ and 60 ℃.