Purpose: The purpose of this study is to prepare basic materials to compare and analyze the unmarried mother-welfare policy of the UK who has a high unmarried mother rate in order to seek the development direction of efficient welfare policy for increased single mother of Korea. Methods: This study is a review study that seeks to see the development direction of future welfare policy by comparing the advantages and disadvantages of each other by seeing the current situation and welfare policy of unmarried mothers in two countries. Results: Compared to the UK, South Korea lacks clear policy objectives in unmarried maternal welfare policy. Realistic housing policies are inevitably demanded, and unmarried mother base operating agencies are significantly short. The actual development of educational sex education programs to reduce the incidence of unmarried mothers, education, publicity is in short supply, the various consultation systems of various dimensions are bad. Conclusion: Through various studies related to unmarried mothers, we must prepare a ground for welfare policy. It is not a temporary exhaustive support but fundamental support measures are necessary. And it is necessary for social infrastructure and multidisciplinary support that single mothers can play their own role as members of healthy society.