Abstract: The quasi-static compressive and tensile experiments of hollow glass beads(HGB)/epoxy were studied. The effects of different HGB mass ratios on the density, modulus and strength of HGB/epoxy were discussed, and its stress relaxation was analyzed. It is found that its various data are decreased with the increasing of  the HGB mass ratio, and the composite has the image of brittle failure, but there is a great deformation before failure, and a great spring back after failure. It shows that the elasticity of the composite is enhanced. The HGB/epoxy composite has obvious stress relaxation, and the relaxation velocity is increased with the increment of HGB mass ratio. It shows that this HGB/epoxy composite has obvious viscoelasticity.