Abstract: Hydrometeor field in the super-cell, multi-cell and single-cell hail storm are given using unmerical modeling. The growing process about the hailstone is analysed based on the simulation. The results show that the starting location of hailem bryo which can growth to large hailst one is decided by the streamline field of hail storm, and the effect of hail embryo size on the form ation of large hailstone is not remarkable. The generation processses of hailstione in three kinds of hail storm are similer each other. Owing to the stremline field is more stable and last longer time in the super-cell hail storm, the larger hailstone can be gennerated in the super-cell hail storm.