If remarried couples want their children to apply for a birth permit, they should follow different circumstances and the provincial family planning policies. Although they remarried, neither of them had children before. For the birth permit, you can bring your account book, ID card and marriage certificate directly. If one party has children before marriage, the application for the birth permit should be the application for the second child, and the following materials and certificates are required:
 （1） Application for the birth of the second child;
 （2） Original and photocopy of resident identity cards, marriage certificates and household registers of both parties;
 （3） Marriage and childbearing certificates issued by both parties' units or village (residents') committees;
 （4） If a child has been adopted, the adoption certificate issued by the civil affairs department; Couples who apply for a second child must be at least 25 years old if the woman is the first child, and at least 30 years old if the woman is the second child. Couples of childbearing age who apply for a second child should apply for a Birth Certificate at the place where the woman's household registration is located before pregnancy If one party is divorced, it also needs to bring the previous divorce agreement or divorce certificate. If both parties have children, it is equivalent to the third child, which is not in line with the relevant provisions of the law. There is no right to apply for a birth permit. The above is just a general description of what procedures are required to apply for a birth permit for remarriage, because different situations and the family planning policies of different provinces are different, Analyze according to the situation. But we should also follow the overall national policy.