滤纸法是一种间接测量非饱和土吸力的测量方法，在用滤纸测定土壤吸力之前需获得能够表达吸力与滤纸含水率之间关系的率定曲线。国内外的研究人员对Whatman No.42、Schleicher & Schuell No.589和国产“双圈”牌定量滤纸的率定曲线已有研究，但是考虑到温度效应的滤纸率定曲线研究还有待深入。采用不同摩尔浓度的NaCl溶液测定了国产双圈203滤纸分别在20 ℃、25 ℃、30 ℃、40 ℃下的滤纸吸湿过程的率定曲线，结果表明滤纸的持水性随着温度的升高而降低，且温度对低吸力段滤纸持水性能的影响要高于高吸力段。通过多元线性回归分析建立了考虑温度效应的率定方程，通过微观结构观测和表面物理化学理论分析了温度对率定曲线影响机制。

Filter paper method is an indirect method to measure unsaturated soil suction, and it is necessary to get the calibration curve which can express the relationship between soil suction and filter paper’s moisture content before the suction of the soil is determined by filter paper method. This paper introduces researchers related researches in the calibration curve of Whatman No.42, Schleicher & Schuell No.589 and domestic Shuang-quan quantitative filter paper; it is found that the researches considering the temperature effect of filter paper’s calibration curve is still rare. The domestic Shuangquan 203 filter paper’s wetting calibration curve respectively at 20 ℃, 25 ℃, 30 ℃ and 40 ℃ is obtained by utilizing NaCl solution at different molar concentrations. The experimental results show that the water retention capability of filter paper is decreased with the increasing of temperature; and temperature has a greater impact on the water retention capability of filter paper when filter paper is in the period of low suction. The filter rate equation considering the effect of temperature is established by multiple linear regression analysis. The microscopic structure of filter paper is observed; and by means of surface chemistry theory, the mechanism of temperature effect on the filter paper rate curve is analyzed.