Abstract:The shear height needs to be reduced mostly in order to apply to the thin coal seam.A new cylinder-stepping-type shearer based on climbing robot was introduced.The hydraulic system of shearer was redesigned,the structure and operation mode of the travel unit were illustrated.The cylinder-stepping-type shearer for thin coal seam has the characteristics of running smooth,high energy efficiency and better braking effect,its body height is only 350 mm.