Effects of temperature on dispersability, adsorption behavior and chemical structural stability of acrylatetype polycarboxylate superplasticizer(PAAE) were investigated systematically and the relationships between these properties and temperature were further analyzed. The results show that the initial dispersability of PAAE increases as the temperature increases, but the time of dispersion retention gradually decrease with increasing temperature. The adsorption amount of PAAE increases as the temperature increase below 30℃ but decrease significantly when the temperature up to 30℃. The ester bond in PAAE is partly broken in the alkaline environment and at higher temperature. The hydrolyzed ratio of PAAE increases with increasing temperature. This hydrolysis of acrylatetype polycarboxylate has directly an adverse effect on dispersion properties.