Due to quality enhancement of the materials used to make rolling bearing and processing modific ation of rolling bearing, the old calculating method can not satisfy the practical requirements,and there are much more factor,which must be considered in calculating the rolling bearing life of load-haul equipment,including open-pit mining loaders,trucks,underground mining LHDS and auxiliary vehicles.The authors summarize the correction method of all parameters in the process of bearing life calculation under conditions of new manufacturing. techniques,operating and lubrication,discuss all shortcomings existing in the process of the derivation of calculating equations,describe systematically the calculating method ,which has been computerized,of rolliing bearing life of load-haull equipment,and put forward a small-size CAD system for the bearing design,which includes main program,data input subroutine,bearing preselection subroutine,life calculation and check subroutine,bearing loading check subroutine,bearing internal loading check subroutine,and form and print subroutine etc.This method described in this paper is a better method in calculating the rolling bearing life currently.