The invention discloses an ecological restoration method for the geological environment of a coal mine. The ecological restoration method for the geological environment of the coal mine comprises the following steps that S1, an open pit coal mine is investigated; S2, at the initial stage of comprehensive treatment, structures, garbage and waste influencing construction in a treatment area are removed; S3, surface soil is collected; S4, overlying rock is stripped, and stripped objects are stacked at a pre-selected site; S5, residual coal is extracted; S6, a deep boundary coal pillar is blocked and covered; S7, a repair area is backfilled and leveled, specifically, the repair area is backfilled, leveled and compacted by using the rock which is stripped firstly; S8, matrix soil covering is conducted; S9, after the matrix soil is backfilled, appropriate plants are selected for planting within the matrix soil backfilling range to conduct ecological restoration; S10, management is conducted after restoration; and S11, microorganisms are added, so that the fertility and air permeability of the soil are favorably preserved. According to the ecological restoration method for the geological environment of the coal mine, waste open pit coal mines and solid waste are subjected to resource utilization, so that the restoration cost is reduced, and ecological balance is achieved.