The influence of Huanghe (Yellow) River Delta (HRD)changes on the tidal wave movement in its adjacent area was studied by using a 2D numerical model. Previous study (Le et al., 1995) showed that in modern times the HRD had silted up forward by 2530.4 km2 during the period 1855 to 1984. The changes of the Huanghe River Estuary (HRE) had significant influence on the tidal wave movement in the Bohai Sea. Due to the unceasing changes of the HRE in the past 100-odd years, some basic features of tidal wave movement have been varying with the HRD development. Although the tail of the Huanghe (Yellow) River (HR) has been relatively stable when the HR passes through the Qingshuigou Stream Outlet (QSO) since 1976, the HRD changes have influenced significantly the tidal wave movement. The main results from this study are as follows. (1) The regular diumal region off the HRD was the largest in 1855 and has been gradually decreasing since then. If the QSO keeps its tendency, it will probably vanish in the future. (2) The M2 and S2 amphidromic point locations and their corresponding amplitudes off St. Wuhaozhuang vary as the HRD develops. The locations of the M2 and S2 amphidromic points have been very close to the coast and their amplitudes have become bigger and bigger since 1855. The M2 amplitude at its amphidromic point location now is greater than 3 cm and the lacation slightly moved southeastward from 1976 to 1992. (3) The high speed region with probable maximum speed of > 120 cm/s varies with the development of the HRD from 1855 to 1976, but has not changed much since then. (4) It can be foreseen that if the QSO keeps on going its way for the coming decades, the amphidromic zones of constituents M2 and S2 will decrease gradually and even disappear. (5) It is noteworthy that the amplitued of diurnal constituent m1 along the northern coast of the HRD has slightly increased since the HR tail moved from the Diaokouhe Stream Outlet to the QSO in 1976.