如今，在人们思想观念逐渐转变和法律意识逐渐增强的情形下，加之社会财富的快速增长，夫妻有了更多的婚内共有财产，夫妻双方要求在婚内分割财产的情况也逐渐增加。最高人民法院于2011年出台了《最高人民法院关于适用〈中华人民共和国婚姻法〉若干问题的解释（三）》（以下简称《婚姻法》司法解释（三）），在第4条中规定了婚内财产分割制度。之后，《民法典》第1066条将婚内财产分割上升为立法，确立了特别的婚内财产分割制度。该制度为夫妻在不离婚的前提下分割财产提供了新选择，目的在于解决夫妻之间的财产纠纷，维护婚姻关系的稳定与家庭的和谐。本文总体上可以分为四个部分。第一部分：引言。阐明婚内财产分割的相关背景及意义，文献综述。介绍了论文整体框架和所要运用的研究方法。第二部分：从立法论维度和解释论维度介绍婚内财产分割的理论基础、指导原则。婚内财产分割，一般以不允许分割为原则，允许分割为例外。围绕共同共有理论，分析并完善夫妻财产共同共有特性，夫妻关系是典型的共同共有关系，同居共财，说明夫妻婚内共同所有财产的不可分性，探讨婚内财产分割请求权的性质，提出可分割的法定事由应当作类推解释。结合案例对婚内财产共有的特性作了具体介绍，说明共有财产分割的裁判理念。第三部分：分析《民法典》第1066条规定的法定事由。界定第一款规定的六种严重损害夫妻共同财产利益的行为、达到严重损害程度的标准；分析第二款规定中夫妻一方负有法定扶养义务的人的范围、重大疾病和相关医疗费用的认定标准。明确了以这两项法定事由进行婚内财产分割时不得损害债权人利益，结合案例说明两项法定事由在司法实践中的适用。并根据司法实践，借鉴非常财产制增加婚内财产分割的事由。第四部分：论述婚内财产分割的法律效果。论述婚内财产分割请求权行使人范围，提出婚内财产分割后新取得财产的归属原则。解释了对夫妻分割共同财产后的债权人利益保护问题。说明了婚内财产分割诉讼中夫妻共同财产分割的起算时间点以及溯及力问题。

Nowadays, with the gradual change of people's ideas and the increasing legal consciousness, coupled with the rapid growth of social wealth, there is more marital property between husband and wife. And the number of couples demanding the division of property in marriage is gradually increasing. In 2011, the Supreme People’s Court promulgated the "Interpretation of the Supreme People’s Court on Several Issues Concerning the Application of the Marriage Law of the People’s Republic of China (3)" (hereinafter referred to as the Judicial Interpretation of Marriage Law(3)), which stipulated the marital property division system in Article 4. Afterwards, Article 1066 of the Civil Code elevates the division of marital property into legislation and establishes a special system of division of marital property. The system provides couples with new options for dividing their property without divorce, aiming at resolving property disputes between spouses and maintaining the stability of marital relations and the harmony of the family.The thesis can be divided into four parts in general.The first part is introduction. The writer clarifies the background and significance of the division of property in marriage, and the literature review. The overall framework of the paper and the research methods to be used are also introduced.The second part is about the theoretical basis and guiding principles of the division of marital property from the dimension of legislative theory and interpretation theory. In marital property division, generally based on the principle of not allowing division, with the exception of division and the theory of joint ownership, this paper analyzes and improves the characteristics of common ownership of marital property. The relationship between husband and wife is a typical co-ownership relationship. They live together and share wealth, which shows the indivisibility of joint property of husband and wife. The writer also discusses the nature of the right to request for the division of property in marriage and puts forward that the separable statutory causes should be interpreted by analogy. Combined with the case, the characteristics of shared property in marriage are introduced in detail and the adjudication concept of the division of common property is explained.The third part is the analysis of the legal reasons stipulated in Article 1066 of the Civil Code. The writer defines the six acts that seriously damage the interests of the couple's common property and the criteria of the degree of serious harm as stipulated in the first item and analyses the scope of person husband and wife have the legal obligation to support as well as the criteria for identification of serious diseases and related medical expenses under item 2. Thus making it clear that the division of marital property on these two statutory grounds shall not prejudice the interests of creditors. The writer also combines cases to illustrate the application of the two statutory reasons in judicial practice, and draws lessons from the extraordinary property system to increase the reasons for the division of marital property according to the judicial practice. The fourth part is a discussion of the legal effect of property division in marriage. The writer discusses the scope of the exerciser of the right to request for property division within marriage, puts forward attribution principles of newly acquired property after the division of property in marriage, and explains the starting time and retroactivity of the marital property division in the litigation of marital property division as well as the protection of creditors' interests after the husband and wife divide their joint property.