Objective To prepare curcumin (Cur)-glycyrrhetinic acid (GA)-PEI-PLGA nanoparticles and optimize the preparation process .Methods Cur-GA-PEI-PLGA nanoparticles were prepared by thin film hydration method .After establishing the analysis method , single factor experiment and orthogonal design experiment were used to evaluate the effects of hydration temperature , hydration time and drug addition on the entrapment efficiency and drug loading , and to determine the optimum preparation conditions .Cur-GA-PEI-PLGA nanoparticles were prepared under the optimum preparation condi-tions , and we determined the entrapment efficiency and drug loading .The morphology of the nanoparticles was observed by transmission electron microscope (TEM).The diameter and zeta potential of the nanoparticles were determined by dynamic light scattering particle size analyzer ( DLS) .Results The optimum preparation conditions of Cur-GA-PEI-PLGA nanopar-ticles were as follows:the hydration temperature was 60 ℃, the hydration time was 3 h, and the drug addition was 7 mg. The entrapment efficiency and drug loading were (58.1 ±1.2)%and (14.5 ±1.4)%under these conditions .The nanop-articles were spherical and uniform under TEM .The average particle size was 330.3 nm, and the nanoparticles distributed evenly (PDI was 0.311), zeta potential was 39.2 mV.Conclusions Thin film hydration method is suitable for the prepa-ration of Cur-GA-PEI-PLGA nanoparticles .The optimum preparation conditions are as follows:the hydration temperature is 60 ℃, the hydration time is 3 h, and the drug addition is 7 mg.%目的：制备姜黄素（Cur）-甘草次酸（GA）-PEI-PLGA纳米粒，并优化其制备工艺。方法采用薄膜水化法制备Cur-GA-PEI-PLGA纳米粒，建立分析方法后，采用单因素和正交设计试验考察水化温度、水化时间、投药量对纳米粒包封率和载药量的影响，确定最佳制备条件。在最佳条件下制备Cur-GA-PEI-PLGA纳米粒，检测其包封率和载药量，采用透射电镜观察纳米粒的形态，动态光散射粒度分析仪测定纳米粒的粒径和zeta电位。结果 Cur-GA-PEI-PLGA纳米粒的最佳制备条件为水化温度60℃、水化时间3 h、投药量7 mg。在此条件下制备的纳米粒包封率为58．1％±1．2％，载药量为14．5％±1．4％；透射电镜下可见纳米粒米粒呈球形，大小均一；其平均粒径为330．3 nm，分布均匀（多分散系数为0．311）；zeta电位为39．2 mV。结论薄膜水化法适合用于Cur-GA-PEI-PLGA纳米粒的制备，最佳制备工艺为水化温度60℃、水化时间3 h、投药量7 mg。
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