The invention relates to a method for realizing combined management of the login account number of a platform system and the account number of a third party system in a computer software system. The method comprises user account number registration processing operation and user account number binding processing operation, wherein the information of a plurality of user accounts is subjected to combined management, so that the combined integrated information can be seen when any one account is registered. By virtue of the method for realizing combined management of the login account number of the platform system and the account number of the third party system in the computer software system, a plurality of third part accounts are bound into one account, the plurality of accounts can be registered together, the same result is seen after registration, and data of binding accounts and bound accounts is combined during binding, so that data share is realized, the same combined information can be seen when any one account is registered, multi-account registration is realized, multi-account binding intercommunication is guaranteed, the processing process is quick and convenient, the work performance is stable and reliable, and the application range is wide.