Abstract:Plant protein peptides are important bioactive molecules with significant effects including antioxidant and antimicrobial activities.They can scavenge free radicals，inhibit the growth of pathogenic bacteria，suppress angiotensin-converting enzyme （ACE） activity，regulate insulin secretion，and enhance plant freezing tolerance by regulating or inducing the expression of antifreeze proteins.This paper systematically reviewed the mechanisms of plant protein peptides in antioxidant，antimicrobial，antihypertensive，antidiabetic and antifreeze activities，and discussed their applications and prospects in practical production and daily life，provided a theoretical basis and direction for related research.