In this letter, we propose and experimentally demonstrate a novel compact power-equalized multi-wavelength laser source (MWL) for the optical I/O technology. This multi-wavelength DFB laser array is used to achieve simultaneous emission of multiple wavelengths with balanced output power and stable single-mode operation. The reconstruction equivalent chirp technique is used to design and fabricate the π-phase shifted DFB laser array to achieve precise wavelength spacing. The power equalizers (PEs) are monolithically integrated in front of laser unit to equalize the output power. The experimental results show that the wavelength spacing of the proposed eight-channel MWL is 100±4.38G, and the maximum deviation of the intensities (MDOI) is 1.00 dB under 25 ℃ working environment. Compared with the traditional MWL structure, the wavelength spacing error is reduced from 0.32 nm to 0.035 nm, and the MODI is reduced from 3.8 dB to 1.00 dB. The output power exceeds 25 mW when the current injected into the SOA is 150 mA. Besides, the relative intensity noise (RIN) of all wavelengths is below -138 dB/Hz, and clear 25 Gb/s NRZ eye diagrams are obtained for the eight wavelengths with the external lithium-niobate Mach-Zehnder modulator. The superior performance of the proposed MWL makes it a promising method for low bit error optical I/O links and high-density chip interconnection systems.