The invention relates to a process for recovering magnesium and manganese elements in industrial waste water. The process comprises the following steps: step 1, determining elements in the waste water; step 2, precipitating manganese chloride; step 3, performing acidification for precipitating salts; step 4, performing distillation crystallization: performing reduced-pressure distillation on a filtrate obtained in the step 3, performing cooling to the temperature of 55 DEG C at the speed of 8-12 DEG C / h, performing heat preservation for 0.9-1.1h at the temperature of 55 DEG C, and continuing to perform cool to the temperature of 0-10 DEG C at the speed of 8-12 DEG C / h, so as to obtain a pulp; step 5, performing centrifugation and drying: pressing the pulp prepared in the step 4 into a centrifugation machine, performing centrifugation drying until no mother liquid is centrifuged out from a centrifugation outlet, so as to obtain a mother liquid and a wet product material, putting the wetproduct material into an oven, performing first drying at the temperature of 205-215 DEG C, taking out the dried material, performing smashing, and continuing to perform second drying at the temperature of 205-215 DEG C, so as to obtain anhydrous manganese chloride; and step 6, performing recovery. The process provided by the invention has the advantages of low costs, high purity and a high yield.