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In order to solve the problem of long-term continuous quantitative monitoring of timing consistency of electrical system interface, a timing consistency monitoring system based on comparison test is designed. The system unifies the timing constraints into constraint vectors by establishing a description model of timing parameters, and inputs them through a graphical interface. The constraint vector contains the measurement points and constraints of the timing parameters. The logical values of each signal under the same event in the ideal timing cycle are encoded as event codes and arranged in the order of events. Using event code sequence as the triggered pattern sequence, target data sequences matching pattern sequence are captured based on Dynamic Event Warping-Boyer Moore (DEW-BM) algorithm, and calculating the measured value of each timing parameter. By verifying whether the measured value satisfies the constraint inequality, the monitoring result of timing consistency of the interface is given (Pass/Fail). The test results show that the monitoring system can correctly capture the target signal, the analysis result of timing consistency is consistent with the theoretical expectation, and the monitoring system has certain correctness and versatility.