Abstract: The shape parameters of semi-tight skirt for subjective evaluation are described as shape,volume,balance,movement,drape,rhythm,steady,uniform,snug,and smooth.An expert group of eighteen apparel professionals including designers,technologists and sales personnel has assessed 41semi-tight skirts made of different fabrics,the total shape value(TSV) is put forward by group decision-making.The BP neural network model of TSV is built up,the data of fabric mechanical properties obtained by FAST system are applied to the input layer,and the output layer is TSV.By analyzing the regression model between measurement value and the predictive value of 8 specimens randomly selected,it is proved that the network model has an excellent prediction precision.