High precise frequency transfer is realized in partial Beijing-Shanghai optical fiber backbone network of 430 km using the cascaded method. The entire cascaded system is comprised of two stages with fiber links of 280 km and 150 km, respectively. To keep high symmetry and low noise, specific bi-directional Erbium-doped fiber amplifiers are used to compensate the large optical attenuation of each fiber link. When the whole system achieves stable status by optical compensation method, the stabilities of 1.02×10-13 at 1 s and 8.24×10-17at 104 s are obtained. Experimental results verify that the actual results of the cascaded system are in accord with the error theoretical ones calculated from the results of two stages.