Abstract: A analytical models for calculating the viscosity, density, compressive strength and modulus of elasticity of solid buoyancy material is established. The effects of hollow glass bubbles(HGB) on the viscosity, density, compressive strength, modulus of elasticity and water absorption of solid buoyancy material are studied by means of the analytical model and experimental data. The results show that the viscosity of solid buoyancy material with HGB of larger particle size is relatively low; When the volume fraction of HGB is fixed, the density of solid buoyancy material increases with the increase of the density of HGB, the compressive strength increases with the increase of the strength of HGB, and the elastic modulus increases with the increase of the elastic modulus of HGB; Under the same hydrostatic pressure, the water absorption of the solid buoyancy material decreases with the increase of the strength of the HGB.