The invention discloses a printing and dyeing process for pure cotton fabric. The printing and dyeing process for the pure cotton fabric is achieved through the two steps of pretreatment and dyeing of the fabric. According to the step of pretreatment of the fabric, desizing, boiling-off and bleaching are integrated into one procedure, procedures of the whole printing and dyeing process are reduced, the period of the whole process is shortened, production efficiency is improved, and production cost is reduced. By means of the dyeing method, dyeing can be complete, and the achieved effect better conforms to intentions of merchants and customers.