【Objective】 To investigate the vaccination status of seven kinds of national immunization program vaccines(BCG,OPV,DPT,MCV,HepB,JEV and MPV) for migrant children in Weiyang district of Xi'an city. 【Method】 758 migrant children and 758 local children of 1~2 years old who lived in the street committees more than or equal to 3 months were sampled by simple random sampling method. 【Results】 100.0% of the total children had immunization cards and 99.9% of them had immunization certificates.The basic vaccination rates of BCG,OPV,DPT,MCV,HepB,JEV and MPV vaccines were respectively 99.5%,99.4%,97.8%,92.5%,98.4%,90.9%,and 93.1%.The immunization coverage of seven vaccines was 90.9%.But the immunization coverage of migrant children (86.8%) was significantly lower than that of local children (95.3%).DTP booster shot rate was 94.0% and MCV revaccination rate was 94.4%.Except MCV(89.7%) and JEV(86.8%),the basic vaccination rates of other five vaccines among migrant children were all higher than 90.0%.Except the BCG vaccination rate and the first hepatitis B vaccine inoculation rate,there were significant differences of other indexes between migrant children and local children.In addition,extending time and unvaccinated were the main problems of injection times. 【Conclusion】 In the floating population gathering areas,apart from completing the work of routine immune-inoculation for local children,more attention should be paid to strengthen the immune program vaccines inoculation work for migrant children.