The invention discloses an SAP platform based code update and automatic transmission realization method and system. The method comprises the following steps: creating a code update and automatic transmission workflow, establishing different auditing roles according to different departments, performing auditing on a code update and automatic transmission request, creating a custom table when the auditing is passed, and storing request information that the auditing is passed; according to the type of the code update and automatic transmission request information, developing a transmission request creation function, a transmission request combination function, a transmission request release function and a transmission application function in an SAP platform; and serially connecting the transmission request creation function, the transmission request combination function, the transmission request release function and the transmission application function by using the workflow to achieve full automation of code update and automatic transmission in the SAP platform from application to termination. According to the realization method and system, the requirement of a transmission management application required for auditing is met, so that a transmission management program conforms to operational habits of users and the operation is simpler and easier.