For measurement of the 87Sr lattice clock probe laser frequency and controlling the red cooling laser and lattice magic wavelength etc, a frequency comb based on a mode-locked erbium fiber laser is built and locked to H-maser. The measurement realizes strong output at desired wavelengths, including 689, 698 and 813 nm (acquire at different time in one branch). The total visible spectrum power is about 120 mW and the power in the single frequency is more than 200 μW within 2 nm (full width half maximum). The beat signal between the comb tooth and the external laser with a signal-to-noise ratio is up to 30 dB (300 kHz resolution bandwidth). The tracking stability is better than 60 mHz at 1 s.