Abstract: In thep reliminary design on the belt conveyor driven with double drums individually, the calculation solution problems related to the frictional capacity of the driving drum were handled with joint driving method of the double drums and the influences of the traction force matching were not considered for the two driving dr ums. Thus the results could cause one driving drum sliding with the belt and the other driving drums overloaded during the operation of the belt conveyor.Therefore und er the condition of the given traction force matching, a total friction standby coefficient of the two driving drums and the friction standby coefficient and calculation formu la of each driving drum were established.The size relationship between the above three was analyzed.The designed cases showed that there were certain problems an d shortage existed in the alternatives design method.The design should be conducted on the principle to meet the requirements simultaneously.The traction force match ing 2:1 of the two driving drums could be more rational and reliable than 1:1 or 2:2.