The price of a tunnel boring machine (TBM) is generally much higher than that of a roadheader. A TBM is a highly specialized piece of tunneling equipment with a complex design and manufacturing process. It incorporates precise mechanical, electronic, and hydraulic systems and is built to adapt to challenging underground environments. Additionally, TBMs come in various sizes and functionalities, with the price of large models reaching tens or even hundreds of millions of RMB.

　　In contrast, a roadheader has a relatively simpler structure, primarily consisting of a cutting head, a propulsion system, and an operator's cabin. While it also requires advanced technology, its price typically ranges from several million to tens of millions of RMB, which is significantly lower than that of a TBM.

　　Overall, the price difference between a TBM and a roadheader is mainly due to differences in complexity, functionality, adaptability, and production costs. As a high-end tunneling machine, the TBM's price reflects its crucial role and efficiency in tunnel construction.