The invention provides a method for increasing deformation of a crawler belt bottom plate. The method includes the steps that firstly, a crawler belt is quadrilateral and the height of a bottom plateframe from the ground is small, a travel driving mechanism drives driving wheels to rotate, and crawler belt wheels carry a whole machine to travel on a flat outdoor ground; then, when the crawler belt wheels are required to carry the whole machine on an undulating outdoor ground to travel, a deformed driving mechanism transfers the power to a deformed screw rod and drives the deformed screw rod to rotate. The deformed screw rod rotates to enable deformation sliding blocks to slide close to each other. Push-pull rods pull I-shaped frames which are symmetrically arranged up and down to rotate the I-shaped frames away from each other around first movable shafts, until the two I-shaped frames form a flat angle. A mounting block moves vertically upwards, the bottom plate frame can move synchronously upwards and the height from the ground is increased, and meanwhile a tensioning mechanism supports the crawler belt outwards and enables the crawler belt from quadrilateral to hexagon; and finally, the travel driving mechanism drives the driving wheels to rotate, and the crawler belt wheels can carry the whole machine on the undulating outdoor ground to travel.