NOVELTY - Planting saline-alkali land lawn comprises: (i) turning over the soil, loosening the surface soil and increasing the water permeability; (ii) digging a main channel and a branch channel, ensuring a smooth drainage and reducing the water level; (iii) applying the soil or covering on the surface of a floor; (iv) covering sand on the surface layer; (v) selecting a saline-alkali resistant grass seed and different grass seeds in different salt contents; (vi) sowing the seed and breeding a trophozoite; (vii) fertilizing the land with a microelement; (viii) shearing grass, watering and ventilating.    USE - The method is useful for planting saline-alkali land lawn.    ADVANTAGE - The method: covers the bared surface of saline-alkali land in a short time; reduces moisture evaporation of the floor and salt content of the surface soil; enlarges vegetation covering area of the saline-alkali land; and protects and improves the ecological environment.    DETAILED DESCRIPTION - Planting saline-alkali land lawn comprises: (i) finishing the soil by turning over the soil, loosening the surface soil and increasing the water permeability before planting; (ii) constructing a drainage channel by digging a main channel and a branch channel, ensuring a smooth drainage and reducing the water level; (iii) applying straw by applying 15-25 cm of the soil or covering on the surface of a floor or using the two together, where the applying amount is 1-2.5 kg/m2; (iv) covering sand on the surface layer with a thickness of 3-10 cm; (v) selecting the grass seed by selecting a saline-alkali resistant grass seed and different grass seeds in different salt contents, selecting ryegrass when the salt content is less than or equal to 1% and planting seashore Paspalum and Halogeton glomeratus when the salt content is greater than or equal to 1%; (vi) planting comprising sowing the seed and breeding a trophozoite; (vii) determining the ratio of nitrogen:phosphorus:potassium of 1:2:2 according to the nutrient condition of the saline-alkali land and the growing demand of the lawn and fertilizing the land with a microelement; and (viii) growing and managing by shearing grass, watering and timely ventilating.