用旋转粘度计研究了均相羧甲基纤维素（ＣＭＣ）／羟乙基纤维素（ＨＥＣ）复合溶液的流变性，考察了复合比、浓度、外加小分子盐和温度对其流变性能的影响。结果表明，复合溶液为典型的非牛顿剪切变稀流体，其粘性指数ｎ＜１：与单一ＣＭＣ和ＨＥＣ溶液相比较，具有一定复合比的ＣＭＣ／ＨＥＣ复合溶液增稠性能更好、非牛顿性更强，而且其粘流活化能较ＣＭＣ溶液低。 The rheological properties of the homogeneous carboxymethyl cellulose (CMC) / hydroxyethyl cellulose (HEC) composite solution were investigated by rotational viscometer. The effects of the compounding ratio, the concentration, the addition of small molecule salt and temperature on the rheological properties influences. The results show that the composite solution is a typical non-Newtonian shear thinning fluid, the viscosity index n <1: Compared with a single CMC and HEC solution, CMC / HEC composite solution with a certain composite ratio has better thickening property, More sexual, and its viscous flow activation energy than the CMC solution is low.