To study the effect of tidal mixture on the formation of upwelling along the Fujian coast, The tide and tidal current in the Taiwan Strait were calculated with the method of ADI and splitting operator. The present results show that the M2 components of tidal wave entering the Strait from the south are stronger than those calculated previously and can influence the region adjoining Jinmen island.The section linked by two points, Weitou (24°40′N, 118°30′E) and Xianxi (24°11'N,120°25′E), can be considered as the middle line of demarcation of the Strait. In the south and north sides of the Strait. The M2 constituent features are determined mainly by the two M2 tidal waves entering the Strait from the south and north,respectively. The section linked by Weitou and Xianxi is the intersect of the two branches of the M2 tidal waves. Affected by sea bottom topography, coastal line and tidal wave propagation, there are three regions with high tidal current velocity and two regions with low tidal current velocity in the Taiwan Strait. Tidal current velocity is high in the vicinity of the Haitan, Nanri, Penghu islands and Taiwan shoal, and low at the south-east side of Taiwan and the middle Strait. Results obtained from the model show that maximum velocity of M2 tidal current is 2.0 m/s which appears in the offshore of Haitan island. Velocities in the low tidal current velocity region are generally about 0.1m/s-0.3m/s. Average values of amplitude and phase of K1 and O1 constituents representing amplitude and phase of M2 constituent were used to calculate M1 tide and M1 tidal current.