With census 1982, 1990 and 2000 data, the research included analyzing life expectancy trends
and regional disparities since 1980s, and attempt to understand socioeconomic characters that affect the
regional disparity. The results revealed that prominent regional disparities are screened from relevantly high
average life expectancy. During the past two decades, regional disparities are enlarged with improvement of
average life expectancy. The research results reveal that economic characters are most significant factors to
regional disparity of both female and male population mortality. West and poor areas and remote areas
collect lowest average life expectancy, where poverty is none the less most important obstacle to further life
expectancy improvement. Culture and education character is second important factor to regional disparity
of mortality. Female education level is especially important to regional disparity not only of female
population, but also of male population. Basic sanitary conditions take effect on regional disparity of
mortality level to some extent. As far as female mortality disparity among areas is concerned, fertility level
has close relationship with mortality level. All the result indicate that education improvement in less
developed areas, basic sanitary facility supplementation, such as toilet, gas and electricity substitution for
traditional fuel step by step will take effect on regional disparity diminution and female average life
expectancy improvement.