The Hun Sen Cup was the main football knockout tournament in Cambodia. The 2017 Hun Sen Cup was the 11th season of the Hun Sen Cup, the premier knockout tournament for association football clubs in Cambodia involving Cambodian League and provincial teams organized by the Football Federation of Cambodia.
The 14 teams from provinces of six zones divided into six groups playing in the First round. Each group was played on a home-and-away round-robin basis. Takeo in Group A and Kampot in Group E directed to Second round due to only one team in their groups. Group winners, runners-up, and the best two third-placed teams advanced to the Second round.
A total of 18 teams played in this round. The six winners from the second round, the eight teams from Cambodian Second League (except the championship team Kirivong Sok Sen Chey entered the fourth round) and the four teams from Cambodian League played in the third round.
Stung Treng and Oddar Meanchey advanced to the fourth round due to Kampong Speu and Sihanoukville withdrew from the Cup.