Using trans-2-butene and hydrogen as the precursor, the glow discharge polymer (GDP) films are successfully coated on glass microspheres with diameters of 350—400 μm and thicknesses of 2.5—3 μm by the glow discharge polymerization technology. Glass/GDP microsphere is heated to test its thermal stability, whose process is the same as the D2 gas charge procedure. The chemical structures, the thermal stabilities of the GDP films, the morphologies of glass/GDP microspheres are characterized by the FT-IR, TG, stereoscopic microscope and X-radiography technology. The Results show that the C/H and C C in GDP films decrease as pressure increases. Their thermal stabilities are better, and the adhesion between GDP film and glass microsphere is enhanced when the GDP coatings are fabricated at lower pressures.