Disclosed herein is a process for preparing a processed product of bean seed coat, comprising the following steps: mixing the bean seed coat with water and subjecting a homogenization treatment so as to obtain a seed coat paste； subjecting the seed coat paste to a heating treatment； and subjecting the heated seed coat paste to an enzymatic hydrolytic treatment with a single enzyme so as to obtain the processed product of bean seed coat, wherein the single enzyme is xylanase.本發明揭示一種用於製備一豆類的種皮加工產物的方法，其包含下列步驟：將該豆類的種皮與水混合並進行一均質處理，俾以得到一種皮糊；令該種皮糊進行一加熱處理；以及令該經加熱處理的種皮糊進行一使用一單一酵素的酵素水解處理，藉此而得到該豆類的種皮加工產物，其中，該單一酵素為木聚糖酶。
