Based on the problems of Bucket Wheel Stacker Reclaimer ability on the low side cannot adapt to the coal output of system, this paper analyzes the Bucket Wheel Stacker Reclaimer capacity correlation factor, and puts forward the suggestions to promote the material ability reform plan. Through the calculation of bucket capacity and reclaiming capacity change, bucket wheel speed, feed distance, bucket wheel mechanism transmission power, it demonstrates the relationship between the bucket capacity change and the material ability, and the economic benefits produced after the reformation. This paper concludes that to increase the bucket capacity is the economic and practical reform method for enhancing the bucket wheel stacker reclaimer capacity, which may have certain promotion value.