The optimal formula and processing parameters of the epidermis and filling materials of a new kind of cake made of Chinese yam,tuckahoe,lotus seed and red jujube were studied by one factor and orthogonal test.The results showed that the optimal formula of epidermis was: Chinese yam powder 8.00%,tuckahoe powder 7.33%,sugar 14.67% and salad oil 6.67%.The best formula of filling materials was: sugar 20.00%,red jujube powder 20.00%,lotus seed powder 24.00% and citric acid 0.20%.The cake contained coarse polysaccharide 13.92% with good shap,uniformity colour,good texture and flavour.In addition,microbiology detection of the product showed bacteria count 10 and mildew colony 20,lower than the detection limits of the national standard.