Abstract: According to the theories of the energy dissipation of wave-water and sediment movement and based on the bottom sediment load formula developed by Dou Guoren, a formula to calculate the transport of the bottom sediment, which includes the bed load and part of suspended load, under the joint action of waves, tidal currents and wind-currents is derived. The formula is used to calculate the sudden siltation amount in the access channel of Huanghua Port in the gale period, and the calculation results are close to the measured values.