Applying simplified computation,numerical analysis and field survey method,taking deep foundation engineering dewatering engineer-ing of Ninghe intercity Zhonghe village station as an example,according to dewatering time and water amount,the paper calculates dewatering well numbers and ground subsidence value. Through tri-dimensional simulation,it obtains water level and ground subsidence value. And combi-ning with field survey data,it finally testifies the computing and simulating results.%采用简化计算、数值分析、现场实测相结合的方法，以宁和城际中和村站深基坑工程降水设计为例，根据其降水时间和坑内水量，计算了基坑降水所需的降水井数量和坑外地面沉降值，通过三维模拟得出了坑外水位的变化和地面沉降值，并结合现场实测数据验证了计算和模拟结果。
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