According to characteristics of restaurant wastewater high oil content, complicated composition and others，the grid-precipitation adsorption process was adopted. The characteristics and the modification non-woven filter the fiber ball (hereinafter referred to as the pretreatment) of food waste water and then the walnut grain adsorption. The results indicate：under the conditions of not changing the pH value，dosing quantity of 30 g/L，adsorption time of 20 min and Oscillation strength for 120 r/min，30℃，the removal rates of COD and oil from the actual restaurant wastewater all reach above 69%,showing significant removal efficiency.