This self-propelled aluminum chassis lawn mower has a larger cutting width of 53CM, 7-speed height adjustment, 25-76mm. On the basis of self-propelled function, this lawn mower adds self-propelled speed regulation function and is equipped with Kawasaki engine imported from the United States, which is environmentally friendly and low-noise. The operator can easily turn the handle located on the upper handle to obtain different machine walking speeds to adapt to different characteristics of mowing work. The lightweight aluminum chassis of the lawn mower has perfect aerodynamic design, smooth grass removal, and good grass collection effect