The first part introduces the Islamic law in the Middle Ages, which is the product of adapting to the feudal social form at that time. With the continuous progress of human civilization and the practical interests of rulers of various countries, Islamic law has been partially changed.

For example, after the Second World War, the revision of marriage and family law in Islamic countries focused on safeguarding the autonomy of marriage, implementing monogamy, limiting the privilege of divorce between husband and wife, and improving the status of women. In Islamic countries, Turkey and Tunisia clearly stipulate monogamy, and other countries also stipulate that husbands must report to the court for approval to marry mistresses, and it must be in one of the following five situations:

(1) The wife is infertile; 2 the wife has an incurable disease; The wife was sentenced to more than two years; (4) The wife has left her husband for more than one year without reason; (5) The husband remarries due to social needs. For example, the Personal Status Law of Tunisia 1958 stipulates that the wife of the deceased can be the widow and the main heir. Somalia 1975 Family Law clearly stipulates that women have the same inheritance rights as men.

1959, the Pakistani land reform regulations stipulated that all agricultural land in China, including land reserved in the form of wakif, was under the unified control of the state. In Turkey, the separation of church and state has been implemented.