Abstract: Abstract In order to study the process of moisture absorption of profiled polyester fabric，this paper selects trefoil polyester fabric and ordinary polyester fabric，uses homemade experimental apparatus，simulates different temperature and humidity conditions and measures the moisture absorption characteristics and wicking effect of the trilobal polyester fabric and ordinary polyester fabric．Analyzing the environmental temperature and humidity how to affect the fabric moisture absorption performance; and Exploring the warp / weft of the fabric how to effect wicking height and wicking rate．Research results show that：The fabric moisture content decreases with temperature rise，along with the increasing of humidity；the moisture absorption rate and equilibrium moisture content of trilobal polyester fabric is larger than that of ordinary polyester fabric，especially in low temperature and high humidity conditions，the advantage is more obvious；the liquid water delivery performance of trilobal polyester fabric is better than that of ordinary polyester fabric，the wicking rate is higher than ordinary polyester fabric，warp fabric wicking ability is better than that of weft fabric．

Key words: trilobal polyester, moisture absorption, moisture absorption rate, wicking effect