针对压铸、挤压等铸型型腔具有曲线、曲面这一情况，对具有任意曲线边界的型腔充填过程进行了研究．对任意曲线边界进行了精确处理，并通过判断自由表面位置，较好地满足了自由表面边界条件，从而提高了数值模拟的精度．采用了易于实现的ＳＯＬＡ方法进行压力速度场迭代，采用改进的ＭＡＣ方法跟踪了自由表面，并给出了一个算例． In view of the fact that the mold cavities such as die-casting and extrusion have curves and curved surfaces, the cavity filling process with arbitrary curved boundary is studied. Accurately processing the boundary of arbitrary curve, and by judging the position of free surface, the boundary condition of free surface can be satisfactorily satisfied, which improves the precision of numerical simulation. An easy-to-implement SOLA method was used to conduct pressure-velocity field iteration. A modified MAC method was used to track the free surface and an example was given.