Two-dimensional numerical models with 1$^{circ}$ and 1/3$^{circ}$ resolution have been established to investigate the Ma distribution of global ocean tides. Especially, a 1/3$^{circ}$ numerical model in this study has the most fine resolution among the existing global tidal model and it has been applied to the computation of detailed tidal distributions in the marginal seas and the shelf seas. Tidal characteristics in shallow areas could be hardly interpreted with the existing global chart due to the low resolution. The Ma tidal charts obtaind by 1$^{circ}$ and 1/3$^{circ}$ numerical model have been compared with the existing global maps and the altimetry-derived tidal charts. Also, the computed harmonic constants have been compared with the pelagic observations. The results obtained by 1/3$^{circ}$ numerical model show better agreement with the existing global charts and the observed data than those obtained by 1$^{circ}$ model. The possibility has been presented that the results obtained by 1/3$^{circ}$ model can provide the open boundary conditions of the regional tidal numerical model.