The utility model provides a two-out-of-two alternating current continuous track circuit which comprises an impedance regulation circuit, a first isolator, a second isolator, a first voltage regulation circuit, a second voltage regulation circuit, a first analog to digital (AD) converter, a second AD converter, a first central processing unit (CPU), a second CPU and a third isolator. The impedance regulation circuit simulates impedance features of a traditional 480 relay to ensure compatibility with the traditional alternating current continuous track circuit. By means of the two-out-of-two structure, the two-out-of-two alternating current continuous track circuit has two independent and isolated operation channels, and detection level of shunt sensitivity is improved. The two-out-of-two alternating current continuous track circuit can replace the traditional 480 relay and effectively improve anti-thunder performance and security.