Abstract: With the rapid development of urban rail transit projects, there is an urgent need for efficient and environmentally friendly crushing equipment. High-frequency crushing hammerheads are widely used in this field with the advantages of high efficiency, low noise, and low dust. The purpose of this paper is to explore the working principles, performance characteristics and specific applications of different forms of high-frequency crushing hammers in urban rail transport engineering, providing a reference for equipment selection for engineering practice. It is found that the high frequency hydraulic breaking hammer is 3~5 times more efficient than the common hydraulic breaking hammer, and the overall fuel consumption is 30% less than the common hydraulic breaking hammer under the same conditions. The construction noise of the high frequency hydraulic breaking hammer is only 50 dB~75 dB. In tunnelling, its efficiency is about 1~2 times of that of common hydraulic breaking hammer. The cost estimate analysis shows that, under the same mining efficiency, the cost saving of excavating the pit stone with high-frequency crushing hammer is about 85%, and the cost saved of excavate the tunnel stone is about 60%. High-frequency crushing hammers have significant advantages in terms of excavation efficiency, energy consumption control, noise reduction and cost saving. It can be an ideal alternative to traditional breaking equipment, provide strong support for the efficient and environmentally friendly advancement of urban rail transit construction, and is expected to play a greater role in more complex engineering scenarios in the future.