The invention provides a vegetable protein powder, a preparation method thereof, and a flavoring comprising the same. The preparation method comprises the following steps: step one, utilizing papain or alkaline protease to decompose soybean meal so as to obtain primary enzymatic hydrolysate; step two, utilizing flavoring enzyme to decompose the primary enzymatic hydrolysate so as to obtain final enzymatic hydrolysate; step three, subjecting the final enzymatic hydrolysate to an enzyme-killing treatment; step four, filtering the final enzymatic hydrolysate, which has been subjected to an enzyme-killing treatment, to remove the insoluble dregs so as to obtain filtrate, and condensing and drying the filtrate so as to obtain the vegetable protein powder. Papain or alkaline protease is utilized to decompose the soybean meal, the obtained vegetable protein powder has the advantages of good flavoring effect and rich taste, and moreover the harmful substance namely trichloropropanol, which can be produced during the acid hydrolysis process, will not be generated during the enzymolysis process, so the vegetable protein powder can be eaten regularly, and does not harm the human body.