Aiming at deeply exploring the analysis of the recording performance of the distribution terminal, this paper proposes an improved dynamic time warping algorithm for detecting the terminal recording platform of the primary and secondary deep fusion equipment. Complete the waveform preprocessing by framing and windowing, and calculate the shortterm energy entropy ratio of the source signal waveform and the terminal recorded waveform affected by noise interference; The short-time energy entropy ratio sequences of the two waveforms were used as the input test vector, and the path planning and similarity calculation are carried out by using DTW for the two waveforms. And by computing two groups of short-time energy entropy than public substring sequence length defined optimization matching waveform similarity coefficient of correction. Experimental simulation and measured data analysis results show that the DTW algorithm combining energy-entropy ratio and common substring can accurately improve the computational efficiency and accuracy of the algorithm. Experimental results show that this method are conducive for the evaluation of recording performance of power distribution terminals.