通过横向比较1988年～2008年世界157个国家(地区)防务负担及其离散度指标,发现中国军费占国内生产总值比例的离散度和离散系数均较低,这在一定程度上反映了国防投入需求的满足程度较低。新时期继续提高中国军费占国内生产总值比例既是必要的,也是可行的。应合理选择国防投入增长方式,实现国防投入与经济建设良性互动,拓展军事投资渠道。 By comparing the defensive burdens and their dispersion indexes of 157 countries in the world from 1988 to 2008 laterally, it is found that the dispersion and the dispersion coefficient of the proportion of China’s military expenditures in the GDP are all lower, which reflects to some extent the national defense The level of satisfaction with input needs is low. It is both necessary and feasible to continuously raise the proportion of China’s military expenditures in the GDP in the new period. The mode of growth in national defense investment should be chosen rationally to bring about benign interaction between national defense investment and economic construction and to expand military investment channels.