The surface micro-pit array plays a huge role in mechanical sealing, friction and wear, surface lubrication, heat transfer and heat dissipation. To be able to jet electrochemical machining micro-pit array on GH4169 nickel-based superalloy, the polarization curves of the alloy in different electrolytes were tested and the electrolyte was optimized. Then, the influence of processing voltage and jet velocity on the micro-pits by jet electrochemical machining was explored, and the micro-pit array was processed by optimizing the process parameters. Finally, using mass fraction 10% NaNO₃ as the electrolyte, processing voltage of 25 V, and jet velocity of 10 m/s, the micro-pit array with high precision and good consistency is fabricated. The aspect ratio is 0.376 and the standard deviation of the aspect ratio is 0.004372 for the micropit array.