  We study the properties of H-dibaryon matter through the SO(3) Skyrmion
solution on a three-dimensional hypersphere $S^3$. As the density increases,
the swelling of H-dibaryon is found. Above a critical density, the system
becomes uniform in terms of the baryon density. In this uniform phase, the
critical order parameter is largely reduced, which can be interpreted as the
chiral symmetry restoration. From the comparison with the $SO(2) \times SO(2)$
solution, the SO(3) soliton is found to be the true ground state for high
density system with $R \leq 0.64$ fm in the B=2 sector with $N_f=3$.
