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回顾了点目标和面杂波的经典雷达方程和接收机噪声基本原理，介绍了三种经典海杂波单位面积反向散射率经验模型。使用经验模型分析了不同飞行高度、特定海情条件海杂波分布特性。使用实际试飞数据印证了实录机载海杂波与经验模型的趋势一致性。结合海杂波背景中目标检测的特点，提出了一种快速评估飞行高度对海杂波背景下目标检测的影响性分析评估方法。最终给出了机载海面监视雷达使用高度的选择建议。“,”The radar equation of dot type target and surface clutter ,and the calculation of receiver front terminal noise power is re-viewed,and then three normally used empirical models of mean sea clutter reflectivity are introduced in detail.The characteristic of sea clutter reflectivity under different flight height and specifically sea status is analyzed by means of introduced empirical models. The trend consistency between the practical radar sea clutter echo and empirical models is compared and verified.The characteris-tic of the target detection in sea clutter is taken into account, then a fast method to analysis and estimation the flight height influ-ence on the radar performance is given.The suggestion of flight height selection to maximize the air-born surveillance radar per-formance is given in the end.