The difference between bivalent, quadrivalent and nine-valent cervical cancer vaccines is mainly the different types of viruses to be prevented, different applicable ages and different prices. 1. Different preventive viruses: bivalent cervical cancer vaccine mainly prevents HPV16 and HPV18 viral infections; quadrivalent vaccine adds HPV6 and HPV11 viruses on the basis of bivalent vaccine; The quadrivalent vaccine adds HPV6 and HPV11 viruses on the basis of the quadrivalent vaccine; the nine-valent vaccine adds several HPV viruses of types 31, 33, 45, 52 and 58 on the basis of the quadrivalent vaccine, which can prevent more than 90% of cervical cancers. 2. Different ages: bivalent cervical cancer vaccine is applicable to women aged 9 to 45; quadrivalent cervical cancer vaccine is applicable to women aged 9 to 45; and nine-valent cervical cancer vaccine is applicable to women aged 16 to 26. 3. Different prices: the price of bivalent cervical cancer vaccine is relatively low; the price of quadrivalent vaccine is higher than that of bivalent vaccine; and the nine-valent vaccine is the most expensive one among the three vaccines.