Abstract: Under the background that farmland circulation plays a key role in land capitalization at present, it is of great significance to explore the influence and mechanism among family non-agricultural income, old-age security, farmland welfare security and farmland circulation participation. Based on the data of China family panel studies （CFPS） database in 2014 and 2018, the relationship among household non-agricultural income, old-age security, farmland welfare security and farmland circulation participation was explored. The study found that household non-agricultural income had a significant positive impact on the old-age security, and household non-agricultural income significantly promoted the transfer out of land through the old-age security and inhibited the transfer in of land. Farmland welfare security significantly inhibited land transfer out and promoted the land transfer in, and had an alternative relationship with the old-age security, which inhibited the influence of land participation of the old-age security. Further research showed that the non-agricultural income of households in the eastern region had the greatest influence on land transfer, and high-income households preferred agricultural land transfer. Based on this, from the perspective of social security, to give full play to the property of land assets and promote land circulation, it is necessary to crack the flow of urban and rural elements, build a modern agricultural system, improve the rural social security system, promote the equalization of social services between urban and rural areas, promote the social welfare of farmers and improve the land circulation market.

Key words: participation in farmland circulation, household non-agricultural income, old-age security, farmland welfare security