Thirty years after its implementation as a national policy, the “one child per family” policy has reduced about 400 million births in China. Despite its effectiveness in controlling population growth, the “one child per family” policy has also engendered a newly vulnerable group“loss of only-child family” (LOCF) due to the increased risk of losing their only-child from accidents or diseases in modern society. LOCF refers to the family that lost their only child yet cannot or don't want to give birth to or adopt another child. It is one of the side effects of the “one child per family” policy that is unique to China and has long been neglected. It is only recently that LOCFs has begun to raise public concern with its increasing number. In 2011, the number of LOCFs in China exceeded 1 million and is estimated to reach10 million by 2035. Behind these huge numbers are great economic burden and psychosocial pressure extoled on both the family and the society, of which psychological trauma has been the core issue confronting LOCFs.