The invention relates to the technical field of garden machines and particularly relates to a pushing type lawn mower. The lawn mower comprises a handrail tube, a power assembly and a cutting knife assembly, wherein an axle assembly is arranged on the lower portion of the handrail tube, and traveling wheels are installed at two ends of the axle assembly respectively. The lawn mower is characterized in that the handrail tube comprises an upper handrail tube body and a lower handrail tube body, the power assembly is installed on the upper handrail tube body, the cutting knife assembly is installed at the bottom of the lower handrail tube body, and the power assembly is in power connection with the cutting knife assembly. The lawn mower is compact in structure, light in weight, high in working efficiency, comfortable to operate and capable of shearing tall stem class herbaceous plants.