How to apply the theory of feasible ability from economics and economic ethics to the study of moral philosophy and eth-ics is undoubtedly an important theoretical work.As Kant believed,as long as there is a kind will arising from respect for innate laws,there must be moral action.As long as there is a healthy and sound psychological personality,there must be a sound moral personality,and then moral practice,which seems to be an unreliable promise,because this is something that only recognizes its possibility and not its inevitability.Only when moral personality becomes a practical ability that can be repeatedly applied,will the situation from will to action that Kant hopes for appear,which is the issue of moral personality becoming a feasible ability.The complexity of moral personali-ty as a feasible ability is manifested in the complex relationship between personality,personality attribute,and personality entity,and more manifested in the historical field that is inseparable from people.From the internal construction,moral personality is composed of four elements:faith,knowledge,emotion,and intention.A sound moral personality is not the individual cultivation and application of a certain element,but an internal logical advancement composed of various elements such as intention,judgment,stimulation,and ac-tion.The main idea of this article is to clarify how moral personality as a feasible ability is possible from the perspectives of moral phi-losophy and ethics,based on different historical contexts.