This paper selects three dimensions(including structual dimendion,relational dimension,cognitive dimension)and three metrics(including social network,social trust,economic organizatin participation) five indexl of social capital to build econometric model to investigate the impacts of social capital on collateral loan with forest property by farmer housholds’ behavior.The results show that the number of relatives and friends who move around regularly has a significant and negative effect on both credit opportunity and real credit quotas of collateral loan with forest property.The friends or relatives whether to work in a bank or credit union,whether to have credit rating in the formal financial institutions,and whether to participate in the farmers’ specialized cooperative economic organization have a significant and positive effect on both credit opportunity and real credit quotas of collateral loan with forest property.Compared to the control group(cannot raise money at all),who can raise 100 thousand yuan within a week has a significant and positive effect on real credit quotas of collateral loan with forest property.In addition,the impacts of social capital on both credit opportunity and real credit quotas of collateral loan with forest property also include income of household and the area of forest land.