The invention relates to a construction method of a grass-shrub mixed ecological hard vegetation module, which comprises the steps of preparing a sticky casting body by reinforcing powder, fine sand and water, casting a hard module reserved with a notch for planting the grass-shrub plantation by the sticky casting body, hardening and molding three days later, planting the selected shrub cutting or bagged seedlings with vigorous growth at the notch, and diffusing the grass stems with germination ability or broadcast sowing the grass seeds on the module and covering a layer of fine sand to formthe ecological hard plant module with mixed grass and shrub twenty days later. The invention replaces the cement without clearance penetrating function with the reinforcing powder capable of forming penetration clearance, the 30MPa strength can satisfy the general resistance requirement, and can be used for hybrid planting grass and shrub. The grass-shrub roots and stems or bagged seedlings are selected for hybrid planting and for three-dimensional afforastation, and the vegetation module is combined with the hard module faster, thereby realizing a self-balanced ecological community, constructing a grass-shrub mixed ecological hard vegetation module and establishing a simple and three-dimensional landscape with rapid formation and stable sustainability.