The utility model discloses a localized line protection test interface. The device is provided with a high-voltage power supply input/output interface circuit, a high-voltage output circuit interfacecircuit, a communication circuit interface circuit, an A-V current and voltage interface circuit, a B-V current and voltage interface circuit and a C-V power supply input/output interface circuit. Thehigh-voltage power supply input and output interface circuit, the communication circuit interface circuit, the high-voltage output circuit interface circuit, the A-V current and voltage interface circuit, the B-V current and voltage interface circuit and the C-V power supply input and output interface circuit are respectively connected with a tested circuit used for in-situ protection. The in-situ line protection test interface can be suitable for testing voltage in-situ line protection of various different specifications and models, and has the characteristics of simple structure and convenience in use.