Abstract: Based on the modified experiments for picture-frame，the in-plain shear properties of the twill and satin tackified carbon fabrics were studied. The results show that the behavior of tackified woven fabrics is similar to that of the fabric. According to the testing results，the shear properties of tackified fabrics are analyzed from the concent ration of tackifier and the fabric architecture. The shear properties of fabrics become poorer and the wrinkling angle is bigger as the concent ration of tackifier is higher. Satin tackified fabrics are easier to form and the load is smaller，compared with tackified twill fabrics. The equation of variation of yarn width during shear loading is fitted f rom the microscopic observation. And a model is established to predict the wrinkling angle. The model is validated as the errors between computational and experimental results are less than 2°.