The Cambodian Second League organized by the Football Federation of Cambodia. There are seven teams in the competition, each team played on a home-and-away round-robin basis. The top four teams progressed to the play-off round, and the two teams in the finals promoted to 2018 Cambodian League. Two teams (Bati Academy and Ministry of National Defense Academy) among seven teams cannot go through to the 2018 Cambodian League, due to Bati Academy is the team founded by FFC and Ministry of National Defense FC Academy are the reserve team of Ministry of National Defense FC, who played in the top Cambodian League.