This machine is an indispensable tool for railway maintenance, construction and emergency repair operations. It uses a hollow drill bit, fast clamping, accurate positioning, fast drilling, simple operation and safety use.The rail clamping device has self-locking function, and high drilling precision. The hollow drill bit is used, and special twist drills below φ13.5 can also be clamped according to needs. It has automatic water supply function when drilling, and is suitable for maintenance, emergency repair and overhaul operations in public works departments.