The invention discloses a preparation method of convenient nutritional shredded bean. The preparation method comprises the following steps: 1) preparing the following raw materials: rice, mung beans, sweet potatoes, apples, figs, white 
hyacinth bean flowers, radix puerariae 
powder, a mint extracting solution, modified 
chitosan, 
centella asiatica 
fermentation liquor and water; 2) soaking the rice and the mung beans for 10-12 h, then uniformly mixing and stirring the soaked rice and mung beans with 
fermentation liquor of radix puerariae 
powder, sweet potatoes, apples, figs and 
centella asiatica, and performing sealed 
fermentation at normal temperature for 10-12 h to obtain a mixture A; 3) adding the mixture A and the white 
hyacinth bean flowers into a pulping 
machine for pulping, and adding a 
mixed solution of the mint extracting solution, the modified 
chitosan and the water while pulping so as to obtain pulp; 4) baking the pulp into round roll cakes by using a pan or a 
nest-shaped pot, and 5) naturally cooling the roll cakes, then 
cutting the roll cakes into shreds, and 
drying the shreds in the sun or baking the shreds to obtain the convenient nutritional shredded bean which is rich in 
nutrition and has the effects of reducing 
blood pressure and 
total cholesterol.