The invention discloses a method for preparing a textured
soybean protein. The method comprises the following steps: firstly, sufficiently and uniformly mixing high-
gluten wheat proteins and soy isolate proteins so as to obtain premixed
plant proteins; secondly, performing high-speed chopping and mixing on the
plant proteins and water till
moisture of materials is uniformly distributed, adding
glutamine transaminase, chopping till the materials are uniformly distributed, and leaving to stand for 0-48 hours at 0-5 DEG C so as to obtain a
plant protein base material; further crushing or screening low temperature
soy flour, dietary fibers and
starch till the
granularity is greater than 80 meshes; mixing the
plant protein base material, the soy isolate proteins, the nano-grade dietary fibers,the low temperature
soy flour and the
starch, putting into a conditioner, adding water, and heating to adjust till the
moisture content is up to 35-40% so as to obtain an adjusted base material; and finally performing
extrusion molding on the adjusted base material, extruding the adjusted base material from the outlet of a mold, and performing
cutting and
drying, thereby obtaining textured soybeanprotein. The textured
soybean protein has the characteristics of high hydroscopicity, high elasticity and fine
fiber-like products.