Abstract: Taking micro-porous plates PN3 and PN23 of NASA Glenn Research Center as prototypes, four flat plates made of micro-channels aligning in single-, four-, eight- and sixteen-row patterns were chosen as the numerical models, and parametrical studies on skin friction reduction utilizing micro-blowing through micro-porous walls were performed for different geometric and physical parameters. Numerical results demonstrate that the velocity near the porous wall is decelerated by the micro-blowing, and thus affects the local skin friction distribution. The parametric studies also reveal the influences on the drag reduction capacities by various relevant parameters, which will provide some guidance on the application of micro-blowing technique (MBT) for drag deduction.