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.
National Defense Ministry were the defending champions, having beaten Preah Khan Reach Svay Rieng 6–5 on penalty shoot-out after 1-1 extra time in the previous season's final.
Stung Treng and Oddar Meanchey advanced to the fourth round due to Kampong Speu and Sihanoukville withdrew from the Cup.
The nine teams (included Stung Treng and Oddar Meanchey) won from the third round, the championship of Cambodian Second League Kirivong Sok Sen Chey and the top six teams of Cambodian League entered the fourth round.