Abstract: Acrylpimaric acid was obtained with rosin and acrylic acid as raw materials and characterized by gas chromatography-mass spectrometry technology(GC-MS). Acrylicpimaric acid polyglycol ester was synthesized by steglich esterification method under mild conditions with acrylicpimaric acid and polyglycol(PEG 2000) as monomers. Structure and properties of the substance were studied by infrared, gel permeation chromatography(GPC), and thermogravimetric(TG). The average-number molecular weight of the substance was 4 700 with the polydispersity index of 1.2. The decomposition temperature of acrylicpimaric acid and polyglycol ester was 308-410℃. The critical micelle concentration(CMC) of acrylicpimaric acid polyglycol ester in water was 1 g/L by surface tension and steady-state fluorescence method. The aggregation behaviors of acrylicpimaric acid polyglycol ester in water were investigated by rayleigh light scattering(RLS), dynamic light scattering(DLS) and scanning electron microscopy(SEM) techniques. The results indicated that the stabilized micelle of 1 g/L acrylicpimaric acid polyglycol ester aggregated as the temperature was higher than the aggragation temperature(74℃) and the aggregation temperature decreased from 74℃ to 65℃ as the solution concentration increased from 1 g/L to 1.5 g/L. And as the temperature of acrylicpimaric acid polyglycol ester solution increased from 25℃ to 85℃, the average diameter of hydrate particle(D_h) increased from 295 nm to 1 056 nm.