Abstract: Application of linear cutting technique with micro detonation cord( MDC) in penetration ejection system was proposed to improve successful probability of aerial aviator/seat escape system and to reduce aeroplane complexity. Different kinds of MDC were designed. Cutting process of polymethyl methacrylate (PMMA) plate by MDC was experimentally studied to determine metal cover material, explosive types, charge quantities. Spallation phenomena were observed, and relationship between the cutting depth and charge quantities was obtained. Process of cutting PMMA plate was simulated using nonlinear dynamic analysis code LS-DYNA to compare with the experiment. Relationship of cutting depth of PMMA plate and charge linear density obtained by numerical simulation is in good agreement with the experimental results.