The invention relates to a multithreading socket synchronous communication access method based on delayed modification. The aim of the multithreading socket synchronous communication access method based on the delayed modification is to solve the problems that in the prior art, a large amount of debug time are consumed, and a lot of manpower and resources are needed. The multithreading socket synchronous communication access method based on the delayed modification includes the following steps of the first step that NUM threads with non-repeated names are established; the second step that M_FLAG is established to set the first N threads as TRUE, socket establishment and server access are carried out to enter a working state, and otherwise the first step is carried out; the third step that initialization of M_SOCKET is established, if failed, the third step is carried out; the fourth step that a connecting request is emitted to the server; the fifth step that the whole multithreading socket synchronous communication access method based on the delayed modification is completed. The multithreading socket synchronous communication access method based on the delayed modification can be applied to the field of network communication.