姚玟隆 饰演 刘一刀杀猪为生，一把杀猪刀不离手，刀出如飞。刘一刀理光头，喜欢打赤膊，虽然话不多，但言出必行。他与妈妈相依为命，非常孝顺，对妈妈言听计从。妈妈看中月娘，临终前要他娶月娘为妻，他遂上门求亲。她拒绝，他竟打死一只老虎以表自己的决心。月娘誓死不从，后来两人结为兄妹，刘一刀更在月娘协助下成为富商。
Yao Wen Long as Liu Yi Dao
Liu Yi Dao is a butcher who cannot part with his knife. He is bald and likes to go around without a shirt. He is a man of a few words but is very loyal and keeps to his words. He is a filial child who lives with his mother and obeys whatever his mum says. His mum later likes Yue Niang and wants her to be her daughter-in-law. He tries to court Yue Niang to no avail. To prove his sincerity towards her, he even kills a tiger. Yue Niang refuses to budge and the two become sworn siblings instead. With the help of Yue Niang, Yi Dao later becomes a wealthy businessman.