The invention discloses a purification and softening method for printing and dyeing technology water, which comprises a compound water purification system (1), a sand filtering system (2), an active carbon adsorption system (3), a cation exchange resin (4), an anion exchange resin (5) and an accurate filter (6); firstly water supply enters into the compound water purification system (1), and then flows past the sand filtering system (2), the active carbon adsorption system (3), the cation exchange resin (4), the anion exchange resin (5) and the accurate filter (6), finally obtaining the printing and dyeing technology water. The method is suitable for purifying and softening the printing and dyeing technology water with not good enough water supply conditions and water quality of water supply containing organic pollutants and inorganic ions such as calcium, magnesium, iron, manganese, chlorine and the like.