A low cost tunable laser module based on distributed-feedback (DFB) laser matrix is achieved by reconstruction-equivalent-chirp (REC) technology. Wavelength tuning,stability and other performance tests are applied,and the parameters of specific wavelength are calibrated. The wavelength spacing between adjacent lasers in the module is uniform,and the P-I diagrams are good. The output light of this tunable laser has a wavelength fluctuation within ±3 pm and a power fluctuation less than 0.02 dBm. The wavelength-tuning range is 1536.64~1559.36 nm,which can covers 60 specific wavelength channels according to ITU-T DWDM standard,and the channel-switching time is 5~30 s.