Method for acquiring high-precision three-dimensional deformation information of landslide

The invention discloses a method for obtaining high-precision three-dimensional deformation information of a landslide, and the method comprises the steps: obtaining a three-dimensional model of a to-be-measured landslide body according to a design construction drawing of the to-be-measured landslide body and point cloud data information obtained through three-dimensional laser scanning; performing unit division on the landslide mass, and dividing the landslide mass into a plurality of cubic units with set side lengths; establishing a landslide independent coordinate system, acquiring three-dimensional information of each cube unit in the landslide independent coordinate system, and constraining the distance between the adjacent cube units; establishing an adjustment equation set of the three-dimensional position relationship among the cube units according to the observed three-dimensional deformation of the partial cube units; and solving the adjustment equation set, and obtaining high-precision three-dimens