Abstract: Honeycomb sandwich is a special configuration which often used in spac ecraft . The method of smoothing particle hydrodynamics (SPH) in the hypervelocity impa ct simulation to the honeycomb presents two questions: it is problematic to mode l the honeycomb, the distance between the neighboring particles should be equal , however, the honeycomb is so thin that the particles would be created too much t o compute. The ANSYS parametric design language (APDL) and the ANSYS user interf ace design language (UIDL) were integrated to create the honeycomb core. The pro g ram was written in APDL, and the APDL program was integrated in the ANSYS user i nterface with the UIDL. Arbitrary hexagon honeycomb core can be created in this method expediently. The honeycomb core was simulated with shell element while th e front facesheet and the rear facesheet was simulated with SPH element in the s imulation. The hole size by the simulation was compared with the experim ent which shows almost equal in size. It is confirmed that the method is suited to the simulation of hypervelocity impact to honeycomb sandwich.