Five optimized genes of capsid L1 protein from human papillomavirus type 16, 58, 18, 6 and 11, which are modified by using insects preferred codons and so on. Method for modifying those genes to express more highly in insect cells. Virus-like particles vaccine compositions comprising HPV L1 proteins or their functional relatives produced by using those modified genes. Those optimized genes of L1 can be used to produce HPV 16 VLP, HPV 58VLP, HPV 18VLP, HPV 6 VLP, HPV 11VLP in insect cells. Yields of virus-like particles derived from those optimized HPV L1 genes are high. Mixed multivalent vaccines comprising above optimized HPV L1 genes can be used to prevent and treat multiple HPV infection and diseases related with it.
