Abstract: According to a long conveying distance,completed route and other problems of the long conveying distance large belt conveyor,in combined with a belt conveyor with domestic single unit max long distance of 12.8 km in the main adit of Wangjialing Mine as a study object,the paper introduced the dynamic analysis on the large belt conveyor,multi driving with " three driving heads and one tail" ,high voltage multi level frequency conversion driving,multi distributed relay lines and optical bus line as well as the key technology and innovation. The paper pointed out the main difference between the major operation index during the trial production period and theoretical dynamic analysis. Meanwhile , according to the main technical problems existed in the design,the proposed that the long conveying distance belt conveyor should have a belt tipping device for the retuning belt surface and should have abackstop set on the driving drum at the head of the conveyor and solutions. The practice results showed that the above technical measures comprehensively applied to the design of the mine main conveying system could effectively ensure the safety and reliable operation of the belt conveyor applied in t he main adit and could provide the theoretical and technical support to the design of the long conveying distance large belt conveyor.