The invention discloses an irbesartan capsule, a preparation method thereof, and an application in consistency evaluation of generic drugs. In the present invention, irbesartan, filler, disintegrant, hydrogel matrix material, acidulant, and surfactant are uniformly mixed in a certain proportion, the adhesive is dissolved in purified water, and sprayed into a fluidized bed granulation bag. One-step granulation in the clothes machine, after drying, mix evenly with glidant and lubricant, fill in ordinary gelatin capsule shell, and prepare irbesartan capsules. The irbesartan capsule produced by the preparation process of the present invention has no obvious changes in properties, dissolution rate, related substances, etc. during the accelerated test and long-term test stability investigation process, and is different from the original research product (product name: irbesartan tablet; commercial product) Name: Anbowei; Specification: 0.15g; Manufacturer: Sanofi Winthrop Industrie) bioequivalent in vivo.