The work aims to promote the recycling of packaging waste paper, save natural resources and protect the ecological environment, as well as study the static cushioning performance of the product based on the optimization of the formula of waste paper fiber foaming products, and perform curve fitting. With waste corrugated paperboard and microwave heating foaming technology, the effects of type and proportion of foaming agent and the amounts of glycerol and calcium carbonate on properties of foaming products of waste paper fiber were investigated by orthogonal test. Based on this, the optimum formula of waste paper fiber foaming products was determined. The static compression test of the material sample was carried out with the best formula, the static cushioning performance of the material sample was investigated, and the curve fitting was performed with Matlab. The optimized formulation of waste paper fiber foaming products was determined: the mass ratio of oven dry waste paper pulp, sodium bicarbonate, foaming agent H, starch, polyvinyl alcohol, glycerol, calcium carbonate and borax was about 32∶3∶1∶0.9∶0.6∶4∶4.5∶0.2. When the minimum cushioning coefficient was about 5, the cushioning performance was better. The static compression curve of the material sample was fitted with tangent and hyperbolic tangent function equation. The residual sum of squares of the equation was 0.000 451, which had high precision. After optimizing the formula, the foaming products of waste paper fiber have better static cushioning performance, and the static compression curve can be fitted well by the function equa-tion.