Based on the survey data traced over a decade of rural households from two poor villages of Nayong County in Guizhou Province, this paper empirically analyses the “poverty prevention” effect and its precision of participatory and comprehensive community development in different periods from the perspective of poverty vulnerability. The results indicated that farmers’ poverty vulnerability dramatically decreased (about 99 percent) from 1999 to 2011, while their anti-risk capability greatly promoted. On the whole, the spot poverty prevention effect of participatory and comprehensive community development is significant, which shall reduce farmers’ poverty vulnerability index by over 5 points, but its time-lag effect is not really obvious. Given various groups, although the poverty prevention of participatory and comprehensive community development results in some “leakage effect” and “overflow effect”, it is somewhat inclusive and precise, which means it can benefit most of the “severe vulnerable households” and “medium and mild vulnerable households”. In other words, except for “micro vulnerable households”, “extreme vulnerable households” and some of “severe vulnerable households”, the other groups of poverty-vulnerability households shall obtain benefits from the participatory and comprehensive community development, and with stronger poverty vulnerability, the less benefits acquired. In addition, the precision of that “poverty prevention” effect is unable to sustain a long period, showing no significant time-lag effect. |