Abstract: According to the development tendency of mine ventilation shaft to be built in the mining block of a large scale coal mine, a large diameter raise boring machine technology with a diameter of 5 m was studied to rapidly and safely construct the mine ventilation shaft.The paper introduced the applications of large diameter mine raise boring machines with the main technical parameters, technical keys and structure features.The paper had detail introductions on the multi motor driving sys tem multi cylinder pushing forward system, hydraulic system, new electric and hydraulic control system and assembling type large diameter reamer structure.Finally intr oducing the site application of the mine raise boring machine to the mine ventilation shaft with the largest diameter of 5 m at home and abroad.