Abstract: The development of shower, hail and heavy rain was simulated by an one-dimensional time-dependent model,using real rawinsonde data as input.Calculations demonstrated the continuity of heavy rain and the low precipitation efficiency in hail cloud. It also showed that Bergeron's process was not important and the warm-rain process was essential for precipitation development in modeled cumulonimbus with warm cloud bases. Comparision of calcutation with observation showed agreement in many aspects.