A multi cable fault automatic synchronous detection method based on bidirectional LSTM and laser scattering signals is proposed to address the current issue of poor detection performance for multiple cable faults. Firstly, collect laser scattering signals from multiple cables simultaneously through laser scattering equipment; Secondly, the waveform characteristic data of the cable laser scattering signal is obtained through nonlinear matching tracking method, and this is used as input for the cable fault detection model; Finally, attention mechanism is introduced into the bidirectional LSTM model to achieve automated synchronous detection of multiple cable faults based on the improved bidirectional LSTM model. The experimental results show that the proposed method has higher accuracy and precision in automatic synchronous detection of multiple cable faults, and is more suitable for practical applications.