Metallic glasses (MGs) are considered as the ideal materials for miniature fabrication because of their ex-cellent micro thermoplastic forming ability in the supercooled liquid region.The understanding and con-trolling of micro filling process are fundamental for miniature fabrication and their applications, yet pres-ently remain unresolved issues.A universal kinetic equation was proposed to describe the filling kinetics of viscous metallic glass supercooled liquid in micro molds with general cross sectional shapes by using a Pd-based MG as the modeling material and a series of potential applications based on the micro thermoplastic forming of the MG were developed.