In this study, using dispersed phase model in ANSYS FLUENT 12.0, the gas-solid two-phase flow field of the developed new type of laser coaxial inside-beam composite powder and wire feeding is three-dimensionally numerically simulated. The effects on the flow field from inlet pressure of shielding gas and the carrier gas flow rate are analyzed. The simulation results indicate that during the coaxial inside-beam powder and wire feeding laser cladding, peripheral shielding gas has very good concentration and collimation effects on the powder beam. The higher the inlet pressure of shielding gas is, the better the powder beam is concentrated. However, too high carrier gas flow rate leads to an enlarged divergence angle of the powder grain flow which is a little far from the composite nozzle.