In order to solve the contradictory problems of time alignment and alignment accuracy in the transfer alignment performance, put forward a transfer alignment accuracy evaluation index. Analyzed the meaning of alignment degree, and the accuracy of transfer alignment is calculated by using the data of post navigation state test. The methods and steps of calculation the alignment degree are given. Example analysis results show that the index can reflect the time alignment and alignment accuracy, but also reflect the differences among each maneuver alignment scheme. The index can be in transfer alignment scheme verification and identification of relevant standards formulated to provide the reference.