The invention discloses a vagina injection agent for treating uterine prolapse. The vagina injection agent is prepared from the following components in parts by weight: 5-20 parts of beta-glucan, 1-10parts of lycium barbarum polysaccharide, 1-10 parts of chitosan oligosaccharide, 5-15 parts of recombinant human serum albumin, 0.05-0.5 part of recombinant human interleukin-22, 0.1-0.6 part of recombinant human interleukin-4, 0.3-1.5 parts of a recombinant human epidermal growth factor, 10-15 parts of active lactobacillus powder, 0.1-1 part of a penetration enhancer, 1-5 parts of a bio-adhesiveagent, 40-60 parts of a buffer solution and 50-100 parts of normal saline. The vagina injection agent directly acts on lesion parts, local drug concentration is high, the vagina micro-environment canbe effectively improved, the micro-ecological balance in a vagina and the normal micro-environment of a cervix are maintained, and local and body immune functions are improved; and the vagina injection agent can further promote cell regeneration, promote collagen synthesis, improve skin elasticity, accelerate repair of damaged tissue, promote tension recovery of pelvic floor muscles, fascia and uterus ligament, and can effectively improve uterine prolapse; and recurring is not prone to appearing after cure, using is convenient and safe, and the effect is fast.