遗嘱是公民生前按照法律规定的方式对自己的财产做出处分并在其死亡时发生效力的一种法律行为。无论古今中外,各国都不同程度上确立了遗嘱自由。并使遗嘱继承成为现代社会普遍接受的继承方式。基于私法的伦理性因素和私有财产的功能,需要对遗嘱自由进行必要的限制。 A will is a legal act that citizens take before disposing of their property in the manner prescribed by law and becoming effective at the time of their death. All walks of life, both at home and abroad, have set free wills to varying degrees. And make testament inheritance a common accepted way of inheritance in modern society. Based on the ethical factors of private law and the functions of private property, the necessary restrictions on the freedom of will are required.