An increase in forest carbon sinks is widely accepted as an important measure for reducing climate change. Based on the complete cycle of reforestation,and assuming without afforestation leakage of carbon sinks on bare land, this paper analyzed the factors of Chinese firs' carbon sequestration by using the C-D production function and discussed households' decision-making measures of carbon supply. This study shows that the increase in the amount of fertilizer at afforestation period, the increase in intermediate cutting labor at tending period, and the increase in employment of additional labor input in the whole process are positively related with Chinese fir carbon sequestration capacity. The characteristics of household have no significant impact on carbon sequestration capacity,while the characteristics of plots and regional differences have impact on Chinese fir carbon sequestration capacity to different degrees. Meanwhile, a decision-making optimizing model was established in this paper under the circumstance of carbon sink's benefits by households. Households need to consider the wages of labor and price of production materials, and also to take the price of wood and carbon into account in management of Chinese Fir. The model provides a decision-making support tool for households to manage carbon sink in the future.