The present invention provides a method and apparatus of synchronizing AAL2 path states between ATM adaptation layer type 2 (AAL2) signaling nodes, wherein a AAL2 signaling node as a synchronization requesting end sends a path state request message to a peer AAL2 signaling node of an AAL2 path, the peer AAL2 signaling node performs local check on the state of the AAL2 path designated by the request message after receiving the request message, and the peer AAL2 signaling node controls consistency synchronization processing on the AAL2 path states at two ends based on the result of the check. The present invention may avoid initial call failure incurred by inconsistency between states at two ends of an AAL2 path and improves success ratio of AAL2 path establishment.