Device for simulating optical link linearization

The invention discloses a device for simulating optical link linearization. The device comprises a Mach-Zehnder modulator, a bias control module, a first optical fiber coupler, a second optical fiber coupler, a low-pass optical receiver, a photoelectric detector and a bias tee; the Mach-Zehnder modulator carries out intensity modulation on an inputted radio frequency signal; the first optical fiber coupler divides an inputted signal into two signals; the bias control module controls the Mach-Zehnder modulator to make the same be a preset bias point according to a received signal; the second optical fiber coupler divides an inputted signal into two signals; the low-pass optical receiver filters a received signal; the bias tee mixes a direct-current bias voltage and an alternating-current signal filtered out by the low-pass optical receiver together so as to adopt a mixed signal as the bias signal of the photoelectric detector; and the photoelectric detector multiplies the two received signals. With the device provided by the embodiments of the invention adopted, nonlinearity can be suppressed.