In this paper,Confucian moral practices will be analyzed through three typical cases.First,Cheng Yi’s“laying emphasis on earnestness”.Cheng Yi said,“Spiritual cultivation requires the application of earnestness,and the advancement of learning lies in the extension of knowledge”.Second,Wang Yangming’s“extending the intuitive knowledge”.This is a summary of his idea after a lifetime practice.The key is the“extending”,a process of development and accumulation.Third,Liu Jishan’s“being cautious when one is alone”.Liu Jishan raised the concept of“sincere intentions”and considered everything is good of no evil,and are issued from and dominated by the mandate of heaven.Therefore,the most fundamental moral practice method of Liu Jishan is to make efforts in the“sincere intentions”,that is,to be“being cautious when one is alone”.