In order to improve the surface activity of fatty alcohol polyoxyethylene ether（AEO）nonionic surfactants， fatty alcohol polyoxyethylene polydiglycerol ethers were synthesized by two-step processing using AEO and glycerine as main raw material， and its surface activity， emulsification property and foam property were measured and analyzed. The results of performance test showed that the turbidity point of AEO₇ -polydiglycerol ethers and AEO₉ -polydiglycerol ethers both increased by 3℃ compared with the corresponding AEO. The surface tension of fatty alcohol polyoxyethylene polydiglycerol ethers solution was all slightly higher than that of the corresponding AEO under the same condition. The critical micelle concentration of AEO₃ -polydiglycerol ethers，AEO₅ -polydiglycerol ethers， AEO₇ -polydiglycerol ethers and AEO₉ -polydiglycerol ethers were 3.16×10^-4 ， 1.00×10^-3 ， 3.14×10^-3 and 5.01 × 10^-3 mol/L，respectively，which were all larger than that of the corresponding AEO. The analysis of foam property and emulsifiability indicated that the fatty alcohol polyoxyethylene polydiglycerol ethers had excellent foaming stability and emulsification property， among which the foaming stability of AEO₉-polydiglycerol ethers was 82.14%.