High precision optical frequency transfer in fiber link is of great significance to optical clock comparison. Bidirectional Er-doped fiber amplifier (EDFA) contributes to loss compensation and high precision transmission of signal in long distance optical frequency transfer. Based on the basic principle of stimulated amplification for erbium particles, a bidirectional EDFA with low noise and high gain which can be used in fiber optical frequency transfer link is designed, and its parameters are simulated and optimized. Experimental results show that the noise index and the gain of the bidirectional EDFA is 3.86 dB and 20.14 dB, respectively. The phase noise introduced is only 0.1 rad2/Hz at the frequency of 1 Hz. The bidirectional EDFA is used as an amplified compensation device in 200 km fiber optical frequency transfer link, and a second frequency stability of 3.8×10-16/s and a ten-thousand second frequency stability of 2.8×10-19/(104 s) are obtained. It has broad application prospects in the field of frequency signal transfer and optical clock comparison.