成文法是统治阶级的意志体现，是由国家制定或认可并由国家强制力保证实施的具有普遍效力的行为规范的总和。习惯法是独立于国家成文法之外、依据本民族或本地区社会权威确立的、具有强制性和习惯性的行为规范的总和。法的分类在法社会学研究中按照不同的标准可以划分成不同的类型，在“国家成文法”之外，还对应存在着 “民间习惯法”，“成文法”与“习惯法”也是法的分类对应的一组范畴。但无论是“成文法”还是“习惯法”其形成历史都很久远，两者在历史发展中相互支持，相互作用，相互补充，同生共存。

在中国历史上，由于受传统礼教文化的影响，在很长一段时间内，“习惯法”都是 “成文法”的来源与基础。1949年中华人民共和国成立之后，由于社会政治经济环境的变化，在中国的法律体系中，“成文法”的地位日益突出，“习惯法”似乎渐渐退出历史舞台。但是在较为偏远的少数民族聚居地区，由于宗教及文化内核的稳定延续，“习惯法”以习俗为形式传统沉淀在社会日常生活的交往关系中，特别是在乡村社会，人们潜移默化地遵循着它。二者作用的不同必然使得在社会实践中“成文法”与“习惯法”二者之间并不总是保持一致，甚至经常存在冲突，不同时代不同国家法律与习俗的相互关系和存在的状态，会形成各自的特定时代主题。如何在现有法律体系中，调适二者之间的关系、探寻社会法治化管理的平衡点，就成为一项重要而紧迫的课题。

中国在少数民族聚居地区实行民族区域自治制度，民族自治地方享有广泛的自治权。如何在国家成文法的原则指导下，在充分尊重和包容少数民族习惯的基础上，吸纳那些与“成文法”原则相容的善良“习惯法”，摒弃违背正常理性与现代文明的落后“习惯法”，使得习惯法成为法源的一种存在形态，建构国家成文法与少数民族习惯法，彼此良性互动的二元结构模式是本文探讨的重点。本文试从新疆维吾尔自治区的哈萨克族的民族习惯及其习惯法变迁、哈萨克族家庭继承习惯法的三种类型比较、哈萨克族继承习惯法与国家继承法的冲突与融合、公序良俗理念下成文法与习惯法的兼抑角度，对以上问题进行分析和论述。

Statutory law is the reaction of thought of the ruling class, it is the sum of universally valid codes of conduct formulated or recognized by the state and guaranteed by the state's force. Customary law is the sum of compulsory and customary codes of conduct that are independent of the statutory law of the country and established in accordance with the national or regional social authority. The classification of law can be divided into different types according to different standards in the study of sociology of law. In addition to the "national statutory law", there is also a corresponding "folk customary law". "Statutory law" and "customary law" are also a set of categories corresponding to the classification of law. However, both "statutory law" and "customary law" have a long history of formation, and both coexist in historical development.

China has long history, due to the influence of traditional ethical culture, "customary law" has been the source and foundation of "statutory law" for a long time. After the founding of the People's Republic of China in 1949, because of the changes in the social and political environment, the status of the "statutory law" in the Chinese legal system has become increasingly prominent. The "customary law" seems to gradually withdraw from the historical stage. But in the more remote areas, especially those areas ethnic minorities living gathering, because of the stable continuation of the religious and cultural influences, "customary law" is still very important, "customary law" incorporated into the people’s social daily life as form of custom, especially in rural society people follow them subtly. The difference between "customary law" and "customary law" inevitably makes them not always consistent in social practice, and often, there are conflicts. How to adjust the relationship between the two kinds of law and explore the balance of social rule of law in the existing legal system has gradually become an important and urgent issue.

China implements regional ethnic autonomy system in ethnic minorities areas where ethnic minorities living gathering, and the ethnic autonomous areas have very extensive autonomy rights because of authority of central government. How to absorb those good "customary law" which is compatible with the principles of "statutory law", under the guidance of the principles of national statutory law, on the basis of fully respecting and inclusive of the habits of ethnic minorities, and abandon those backward "customary laws" which against normal rationality and modern civilization, make custom become the sources of law, and construct a benign interaction modle between "statutory law" and "customary law" are the focus of this paper. This paper tries to analyze and discuss the above issues as followings: introduce the Kazakh nation who are living in Xinjiang Uygur Autonomous Region, and the changes of custom of Kazakh nation; compare the difference between three types of traditional family property inherit custom of Kazakh nation; discuss the blend and confliction between national inheritance law and traditional family property inherit custom law of Kazakh nation; analyze the merger and exclusion between "statutory law" and "customary law" in public order aspect.