Simple method for extracting natural taurine

The invention provides a simple method for extracting natural taurine. The invention is characterized by comprising the following steps: raw material pretreatment: after cleaning seashells, boiling at high temperature, collecting the soup, and concentrating; impurity removal with ethanol: adding ethanol into the concentrated soup to obtain a precipitate and a supernatant; concentrating the supernatant to obtain a concentrated solution; crystallization: adding 3-4 times by volume of anhydrous ethanol into the concentrated solution, immediately carrying out vacuum filtration for impurity removal, standing the filtrate at 4 DEG C to crystallize for more than 24 hours, carrying out vacuum filtration, and drying the solid to obtain the taurine coarse crystal; and for enhancing the purity of the taurine, carrying out recrystallization one or more times as required. The method provided by the invention can effectively utilize seashell processing byproducts and enhance the utilization ratio of ocean resources. The invention has the advantages of simple technique, low extraction cost, high extraction rate, energy saving and environmental protection. The ethanol used in the method can be recycled, thereby being beneficial to industrialized production.