Dog Bite Dog (Chinese: 狗咬狗) is a 2006 Hong Kong action crime thriller film directed by Soi Cheang and starring Edison Chen as a brutal Cambodian assassin, desperately trying to evade the police, led by Sam Lee, after completing an assignment in Hong Kong.

A young Cambodian man who has been trained to fight for money in his country is hired to kill someone in Hong Kong.

The father goes into a coma after being shot, and internal affairs suspects him of dealing drugs on the side.

They both plan to get back on a ship to Cambodia but have to get past Hong Kong police, who do everything they can to catch him.

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