In this work, GO was prepared by Hummers’ method (Zhao 2010, Marcano 2010, Wang 2008). GO was characterized by several techniques, such as XRD, TEM and AFM. The PA1212/GO composite was prepared by the one-step and two-step compounding process to compare the effect of the two methods. The mechanical and crystallization properties of pure PA1212 and the composites were investigated.