Christianity and socialism are religions and ideas accepted in the 19th and 20th centuries. Christianity and socialism were the ideological foundations of the national liberation movement, which united together for the common purpose of national liberation and unification. When South Korea and North Korea must aim for reconciliation and unification beyond hostility and division, South Korea’s Christianity needs to meet socialism and North Korea’s system needs recognition of various religions. In this context, Kim Chang-joon is noteworthy. Kim Chang-joon is often regarded as a Christian national socialist, but he was sold as a Partisan due to his past history of North Korea. Previous studies have not conducted a three-dimensional study on why Kim Chang-jun is evaluated as a Christian national socialist. This paper attempts to analyze the basis for evaluating Kim Chang-jun as a Christian national socialist by linking Christianity, nationalism, and socialism, which are somewhat difficult to connect. I would like to discuss what kind of Christianity he was, what kind of nationalist he was, what kind of socialist he was, and how these three could be fused and integrated..