Based on the P-wave travel-time data of 2 538 earthquake events(M_L≥1.0) recorded by 198 fixed stations of CENC from 2019 to 2023, the three-dimensional velocity structure of the crust in this area is inversed by double-difference tomography, earthquake relocation via double-difference tomography and waveform cross-correlation for enhanced accuracy and reliability, it reveals the coupling relationship between crustal structural heterogeneity and seismic activity under the background of craton destruction. The results show that after relocation, the root-mean-square(RMS) of seismic travel time residuals is reduced from 1.09 s to 0.52 s, and the residual average is optimized from －0.33 s to 0.02 s, the accuracy of the velocity model has been improved. Set four profile lines distributed in the Shanxi Jinzhong fault zone, Yanshan structural zone, Tangshan fault zone, Xingtai-Handan fault zone and other fault zones where earthquake events are more concentrated. Velocity structure analysis reveals that most seismic events are clustered within transitional zones between high- and low-velocity anomalies, the crustal thickness exhibits significant lateral heterogeneity. In the volcanic rift basin of Datong, Shanxi province, enhanced thermal-chemical upwelling corresponds to prominent low-velocity anomalies. The Yanshan tectonic zone displays alternating low-velocity and high-velocity anomalies, reflecting unstable stress conditions and structural anisotropy. Multiple strong earthquakes along the Tangshan fault zone predominantly occur within transitional zones between high-velocity and low-velocity anomalies. The Xingtai-Handan fault zone demonstrates concentrated seismic events likely triggered by lithospheric delamination processes associated with high-velocity anomalies.The dynamic mechanism of the destruction of the North China Craton is jointly dominated by lithospheric delamination, thermochemical erosion, and mantle convective erosion induced by the subduction of the Pacific plate, providing new geophysical constraints for understanding the stability evolution of the craton and the mechanism of strong earthquake propagation.