The invention discloses a signaling link access and identification method, which includes that: a signal framing module is connected into the signaling link, collects signaling data and outputs E1/VC12 frame signals based on high-level data link control (HDLC); an E1/VC12 demultiplexing unit sequentially extracts 128 time slots in the E1/VC12 frame signals according to bit interleaved reuse principle of E1/VC12 and processing amount, positions and reuse speed of time slots in E1/VC12, and outputs 128-path time division data flow; and serial-to-parallel conversion HDLC decoding unit conducts HDLC frame alignment and protocol decoding for the time division data flow and outputs a 128-path original signaling data packet. By adopting an embodiment of the ignaling link access and identification method, high-density signaling link access and fast, convenient and reliable signaling distinguishing can be achieved during high-capacity signaling interface collection.