Environment-friendly detergent and preparation method thereof

The invention belongs to the technical field of washing products, and particularly relates to an environment-friendly detergent and a preparation method thereof. The preparation method comprises the following steps: S1, adding wheat flour into water, uniformly stirring, adding alpha-amylase, stirring to obtain a solution A, drying the solution A to constant weight to obtain flour blocks, and grinding and sieving the flour blocks to obtain flour particles; s2, adding flour particles into water, uniformly stirring, adding a citric acid solution, uniformly stirring to obtain a solution B, adding glycerol into the solution B, stirring, and performing ultrasonic oscillation to obtain a solution C; s3, adding sodium carbonate, edible gelatin powder, sodium benzoate, edible essence and edible sodium alginate into water, uniformly stirring to obtain a solution D, slowly adding the solution D into the solution C while stirring to obtain a solution E, and performing ultrasonic treatment on the solution E under a consta