Due to the actual production needs of underground coal mines, during the tunnel excavation operation, due to the increase in the width and height of the tunnel section requirements, the traditional tunnel boring machine in use may not be able to meet the design requirements of the actual tunnel section, and must be expanded and upgraded in the height direction and width direction of the original tunnel. The traditional solution is to replace the original tunneling equipment, but this method greatly increases the material cost. In order to reduce costs and increase efficiency, it is a reliable and simple method to upgrade and transform the original tunneling machine. The original tunnel boring machine can be improved in two aspects according to the actual use requirements of the customer: increasing the height of the fuselage and the length of the cutting arm to adapt to changes in the coal seam and increase the cutting range and other usage requirements. At the same time, during the design process, not only the increase in length and height must be considered, but also the interference of the size and angle of the fuselage needs to be verified to ensure that the functional modification of the equipment is reasonable. This method not only provides a strong basis for increasing the cutting capacity and range of the tunnel boring machine, but also greatly broadens the equipment’s functions. It is a cost-effective and efficient improvement plan, and it also provides tunneling equipment for other tunnels and even non-coal tunnels reference basis.