According to the provisions of the "Marriage Law", as long as you are a legal citizen of the Chinese people, you have the right to register for marriage, and it has no connection with any criminal record in prison.
Although it has no impact on your marriage, it will have an impact on your future job hunting, such as civil servants, lawyers, judges, etc. Generally speaking, as long as it requires political review or does not carry criminal penalties under laws and regulations, you cannot do it after being imprisoned.
And the next generation, that is, children, will also be affected because either spouse has been in prison. If parents have criminal punishment records, their children cannot apply for some careers with high political and legal requirements. If you can't join the military. Article 8 of the "Regulations on Political Review of Conscription" stipulates that citizens who have any of the following circumstances shall not be conscripted into active service, and their main family members, immediate relatives, major social relations members or other relatives who have a significant influence on them have been criminally punished, Expelled from the party, dismissed from public office, or has serious illegal issues that have not yet been investigated, or acts of cover-up or retaliation.