The present invention relates to a skin-tightening cosmetic composition and a method of applying the same, and more specifically, to a cosmetic composition a method of applying the same that includes a hydrolyzed plant protein and glycoprotein. The cosmetic composition includes a hydrolyzed plant protein and glycoprotein in an optimal amount, thereby causing the occurrence of an immediate contraction effect and a long-lasting contracting effect, and achieving skin improvements such as skin moisturizing and induction of synthesizing collagen and elastine in use of the composition over a long period of time.