Ground surface crack treatment method for subsidence area

The invention provides a subsidence area ground surface crack treatment method, and relates to the technical field of ecological environment construction engineering. The method comprises the following steps: dividing a space above a first depth of a ground fracture as a catchment area; the space below the first depth of the ground fracture is sequentially filled with impervious layer filler, water-holding layer filler and surface soil cover layer soil from bottom to top in the vertical direction; wherein the component of the impervious layer filler mainly comprises coal-based solid waste-fly ash; the water holding layer filler mainly comprises coal-based solid waste-gasified fine slag, straw powder and organic fertilizer; the surface soil of the subsidence area is adopted as surface soil of the surface soil cover layer. Water and soil loss caused by ground fissures in the subsidence area can be effectively reduced, and threats of surface water to arid and semi-arid surface ecological safety and underground o