The notion of non-meat eating in Compassionate Samādhi Water Repentance integrates the thoughts of filial piety, life preservation, and the evolution of the nature and human being. This article points out that this notion, inherited from the edict of Emperor Liang Wu-di, promoted further the practice of non-violence originated from the emperor's command. Compassionate Samādhi Water Repentance objects to the karma of killing, and publicizes the ideas of non-killing according to the first commandment, and "existence being equal". The non-meat eating concept in Compassionate Samādhi Water Repentance has experienced several stages of development, reflecting the precept of non-killing was advocated unconsciously in the initial stage and consciously afterwards.