Paddy rice water balance simulation is an important part to study the water saving theory of rice . This paper divides paddy field water balance into two categories , i . e . field water layer and dry layer , and proposes the calculation process and methods of water balance model about water -saving irrigation for paddy field . It provides theoretical reference for other places to establish such model .%稻田水量平衡模拟是研究水稻节水理论的重要环节。将稻田水量平衡分为田间有水层和无水层2种情况，提出了节水灌溉稻田水量平衡模型参数的计算过程和方法，为其它地方建立适合本地区情况的节水灌溉稻田水量平衡模型提供了理论参考。
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