Abstract: The disclosure provides a method for realizing call priority access, which includes: a Mobile Switching Center emulation (MSCe) adds priority information of a current call into a message of establishing a terminal which is notified to a Media Gateway (MGW); the MGW obtains priority of the call; and the MGW applies for call-related resources for the current call, and performs call priority access processing according to the priority of the current call when the call-related resources applied for by the MGW are busy. The disclosure further provides a system for realizing call priority access. The solution of the disclosure enables the MGW to realize the call priority access in a priority access way when the MGW applies for call-related resources, enriches and improves call priority access service of a communication network, and has extensive application prospect.