Accurate extraction of modal parameters is an important basis for identification of explosive composite structures interface state. A new modal parameter identification method for explosive composite structures based on Dual-Tree Complex Wavelet Transform(DTCWT) and Laplace wavelet correlation filtering is proposed. With the resistance band aliasing effects of DTCWT, the multi-modal vibration response signal is decomposed into a set of single mode signals, and then the modal parameters of the explosive composite structures are extracted by Laplace wavelet correlation filtering method from the single mode signals. The proposed method is validated by the experimental data of explosive composite pipe, and then the natural frequency and damping ratio of the pipe are extracted accurately. Furthermore , the precision of the proposed method is better than that of Laplace wavelet correlation filtering directly. The proposed method is applied to explosive composite pipes of different interface state on the production line, and the modal parameters are extracted effectively.