Supervenience physicalism is the mind-body theory nonreductive physicalist uses supervenience to build.As an opponent to nonreductive physicalism,reductive physicalists proposed"wayward atom"as a counterexample to doubt supervenience physicalism.According to"wayward atom",once physical properties vary slightly,mental properties vary vastly.In order to deal with this counterexample,supervenience physicalists put forward"similarity"approach to revise the original expression.However,this approach couldn't explain away"wayward atom".This paper provides a"trivial theory"approach.According to"trivial theory"approach,the proponent of"wayward atom"misunderstood"minute"and"insignificant",and ignored the development of physical knowledge.Therefore,"wayward atom"is trivial.