The invention discloses a nylon-cotton fabric dyeing process which is characterized by comprising the following steps: firstly, soaking nylon-cotton fabric into a dye solution for pad dyeing, and then drying the nylon-cotton fabric; soaking the fabric into a pad dyeing reduced feed solution for the second time, and carrying out steaming reduction, water washing, oxidization and soaping to enable the dye to color the fabric fully; and then, drying the fabric, thereby completing the whole required dyeing processes. The dyeing process changes a two-bath two-step method into a one-bath two-step method, has high dyeing fastness, does not need to consider the two colored effect when two kinds of fibers are dyed, has good level-dyeing property on cloth surfaces, omits the high-temperature high-pressure overflow dyeing of acid dyes and the high-temperature baking of disperse dyes, has little water consumption, reduces environmental pollution, greatly reduces energy consumption, saves production cost and improves production efficiency.