The delay time identification of blasting network is easily affected by the mode confusion of EMD,and the IMF with false components is obtained.However,the Hilbert transform is constrained by the Bedrosian theorem.When dealing with such components,it will produce negative instantaneous frequency,resulting in huge identification error.CEEMD-MPE-NHT blasting network delay time analysis algorithm was proposed to solve the problems of traditional HHT blasting network delay time analysis.In this algorithm,EMD mode confusion suppression is achieved by improving EMD and obtaining the complementary set empirical mode factory-Multiscale Permutation entropy(CEEMD-MPE) algorithm.The IMF obtained by CEEMD-MPE is transformed by normalized Hilbert transform to remove the constraint of Bedrosian theorem on Hilbert transform.The envelope of the IMF component with the largest energy content is solved,and the time interval corresponding to the envelope peak value is the actual delay time of the blasting network.By analyzing the difference between the actual delay time and the theoretical delay time,it can be judged whether the detonator is in normal service condition.Further,through the interference reduction method,the most reasonable delay time of the project is 54.51~59.75ms.The research results show that the blasting network delay time analysis based on CEEMD-MPE-NHT has important practical significance for blasting safety control.