The invention relates to a rayon fabric dyeing and finishing method. The rayon fabric dyeing and finishing method comprises the following steps: conducting dyeing pretreatment and antistatic and crease-resistant finishing on a primary woven rayon fabric, conducting dye discharge print on the cooked and formed primary woven rayon fabric, immersing in a staining fluid, wherein the staining fluid comprises 1 ml/L of a dye and 1 ml/L of a chelating agent; raising the temperature to 40-50 DEG C, steaming with vapor for 20-30 minutes in a rapid steamer at the steam pressure of 2 kg, raising the temperature of a curve to 50-60 DEG C, preserving the heat for 10 minutes, adding salt and sodium carbonate, wherein the masses of both the salt and the sodium carbonate are the same and are both 3-5 g/L;raising the temperature of the curve to 60-70 DEG C, preserving the heat for 10 minutes, adding a dye fixing agent, and post-processing. The third-dimensional effect of a discharge print pattern obtained through the method is strong, the fastness of a dye is high, the effects of moisture permeation and UV resistance meet satisfaction, and the dyeing effect is good.