Method for solving problem of active dark dyeing layer difference of cheese at low bath ratio

The invention relates to a method for solving the problem of active dark dyeing layer difference of cheese at a low bath ratio. The method is characterized by comprising specific steps as follows: density of loose yarn is 0.43-0.47 g/cm ; in a dyeing process, firstly, heating is performed, an efficient cotton dye leveler and a complexing agent are added, dye is added to an auxiliary cylinder and stirred until the dye is completely dissolved and then is added to a main cylinder, salt is added for the second time, alkali is added for the first time, the temperature is kept at 58-65 DEG C for 10-15 min, alkali is added for the second time, the temperature is kept at 58-65 DEG C for 10-15 min, and last alkali is added, dyeing insulation is performed, that is, the temperature is kept at 58-65 DEG C for 30-65 min, and dyeing sampling is performed after temperature keeping. In the whole dyeing process, a gradient temperature keeping method is used repeatedly, so that yarn can be fully swelled, the dye can be contact