The invention provides an establishment method for a greening lawn mixed with flower spots and a roof flowered light lawn; the establishment method comprises the following steps: the production of a sod and a grass carpet which comprises the steps of turf bed laying, vegetative propagation or sowing propagation of eremochloa ophiuroides, secondary grass planting, over-seeding of low leguminous grass seeds, and the formation of grass carpet product; and verdurization of the lawn and the sod; in the latter step, leguminous grass seeds can be directly over-seeded on an eremochloa ophiuroides lawn; or the lawn is established by mixture sowing of the eremochloa ophiuroides and the leguminous grass seeds; or the eremochloa ophiuroides and the leguminous grass seeds mixed sowing sod is used for greening lawn establishment, and the carpet-shaped eremochloa ophiuroides-leguminous grass carpet is used for the establishment of the greening lawn mixed with flower spots. The eremochloa ophiuroides -leguminous grass carpet can also be applied to roof lawn establishment, and the procedure comprises the steps of laying a waterproof layer, placing an anti-pricking layer, draining and irrigating water, laying and maintaining grass carpet. The establishment method of the invention has the advantages of simple production and establishment method, high quality of lawn establishment, good greening decorative effect, low cost, convenient maintenance and management, high economic benefit and extremely strong popularization.