Abstract: Aiming at the present situation that most of the opencast coal mines in China distribute in the northern area and the wildly applies the Shovel-Truck technology，and considering that the frigid climate has important effects on mechanical equipment fuel prices，maintenance and working performance in mine area，the relation between frigid climate，fuel prices，sticky bucket coefficient and technical failure rate is analyzed，and the influence on strip mining cost from frigid climate is calculated by the theoretical analysis method and the statistical analysis method，and on the basis of the analysis of open pit mining limit's determining principle and the influence factors.The calculating method of economic stripping ratio for open-pit coal mien is researched and confirmed by considering the climate factors.Taking two opencast coal mines with the same scale but different weather conditions for examples，the applicability of the design standards of open-air mines in coal industry in opencast coal mines with different weather conditions are compared and analyzed，which present that the economic stripping ratio of mine A without influence from the frigid weather is 6.32 m3/t，and on the other hand，it is 5.78 m3/t in mine B which is strongly influenced by the cold weather.All of these show that the frigid climate will increase the open pit mining cost and lower the economic stripping ratio，so it should be taken into consideration in boundary delineation of surface mine.

Key words: Opencast coal mine, Shovel-Truck technology, Frigid climate, Adhering clay in hopper, Economic stripping ratio, Mining limit