本文介绍了一种简单易制的田间渗透仪。它可用来测定田间土壤的渗透系数。这种仪器在设计上,采用了由大到小的逐渐变化的水压梯度,使渗透过程更符合于田间实际情况。此外,它还能自动记录渗透的全过程。使用方便,可以应用于大面积土地上的多点测试。文中提出并讨论了渗透系数的计算原理和测定结果的校正。 This article describes a simple and easy to use field infiltrometer. It can be used to determine the field soil permeability coefficient. The design of this instrument, using descending gradient of water pressure gradient, make the infiltration process more in line with the actual situation in the field. In addition, it automatically records the whole process of infiltration. Easy to use, can be applied to large areas of land on the multi-point test. In this paper, the calculation principle of permeability coefficient and the correction of measurement results are proposed and discussed.