It is mainly used in railway line construction, and has the functions of changing sleepers, square sleepers, ballasting, digging, tamping, trimming and lifting. the road and rail dual-purpose traveling mechanism is adopted, which has high traveling speed and high power, and is suitable for construction under various working conditions, especially for the working environment that needs long-distance back and forth operation, such as demolition of old stations, replacement of pillows in long bridges and long tunnels. Including pillow changer