Abstract: The lower part of the curtain-type breakwater is opening, which facilitates the exchange of seawater inside and outside the port, prevents the deterioration of water quality, and maintains the ecological balance of the original water area. Therefore, simulating the interaction between waves and the breakwater has an important practical significance. A numerical model is established based on the high-order constrained interpolation CIP (Constrained Interpolation Profile) method of the two-dimensional wave numerical model flume. By comparing with existing literature results, the research results show that the numerical model proposed can effectively simulate strong nonlinear phenomena such as wave breaking when solitary waves impact the curtain breakwater. Through numerical simulation, the evolution process of velocity and vorticity is described in the interaction between the width and immersion depth of different curtain breakwaters and solitary waves, and the influence of solitary wave height and of curtain breakwater structure size are discussed through the reflection coefficient, transmission coefficient, dissipation coefficient and impact force on the curtain breakwater. Research results also show that: when the relative immersion depth of the curtain type breakwater is larger, the wave suppression effect is good, and the relative width of the curtain type breakwater has a greater influence on the wave suppression effect.