Abstract: To investigate the damage and fracture behavior of pre-fissured rock under impact load and reveal the damage and fracture mechanism of surrounding rock, the rock damage phase field model considering rock heterogeneity and the significant difference in its mechanical responses under tension and compression was established. On the basis of the static rock damage phase field model, a dynamic phase field model for rock elastoplastic damage coupling was constructed by introducing the inertial force term. The numerical calculation program named TL-FEMS (Three Layers Finite Elements Method Structure) was proposed to implement the rock dynamic damage phase field model. Firstly, the effectiveness of the elastoplastic damage-coupled dynamic phase field model and the TL-FEMS numerical calculation program was verified through comparative analysis with existing results of dynamic tensile tests on pre-notched rectangular plates and dynamic failure tests on thick-walled cylinders. In addition, uniaxial compression numerical simulations were carried out on specimens with two fissures. The simulation results showed a high degree of agreement with laboratory test data and existing numerical simulation results. The numerical simulation results of dynamic compression of pre-fissured rock under impact load indicate the following characteristics, the tip of a single crack propagates first and a reverse crack appears under impact load. Its exhibiting an "X"-shaped damage and fracture pattern. With the increase of crack inclination angle, the crack propagation mode gradually transitions from the "X" type to the "I" type. For double cracks under dynamic load, crack initiation occurs at the crack tips, the connecting cracks at the inner ends of the double cracks in the rock bridge region develop initially and then stagnate, while the wing cracks at the outer ends propagate continuously and eventually coalesce. Analysis of stress distribution characteristics shows that obvious stress concentration zones also emerge at the crack tips and inside the specimens. The proposed rock dynamic damage phase field model provides an effective approach for studying the damage and fracture problems of fissured rock, and it holds important research significance for analyzing the stability of rock engineering structures under complex geological environmental conditions.