The invention discloses an environmental-friendly type polyurethane non particle spraying material used in stadium ground layer, which is formed by the mixing of component A and component B; wherein, the weight proportion of component A and component B is 1:3; the component A is obtained by mixing diphenylmethane diisocyanate and polyether glycol according to certain proportion; the component B is obtained by mixing polyether-tribasic alcohol, polyether glycol, dry process montmorillonite clay, 3, 5-methyl-sulfide base tolylene diamine, trimethylolpropane, epoxy resin, two-octyl, silica dioxide powder, calcium bicarbonate, organobentonite, iron oxide red or tartrazine-phthalo green mixture and metal carbonyl carboxylate according to certain proportion. The invention also discloses a preparation method of the material, which includes the steps: first preparing the component A and the component B respectively in specific condition, and mixing and stirring the component A and the component B to obtain the material of the invention. As the material of the invention contains no TDI and MOCA, the polyurethane non particle spraying material has no toxicity and safety hidden danger, and is an environmental-friendly material.