The invention discloses a tanning method of less-bath pickled high-absorption chromium salt, which is characterized by including the steps of adding 10 to 50 portions of water and 0 to 3 portions of salt into 100 portions of intenerated pelt after being dripped; then rotating for 5 to 15 minutes; using 0.5 to 2.4 portions of acid to process for 30 to 120 minutes and adding 1 to 4 portions of accessory ingredient to pre-process for 30 to 50 minutes to keep the pH value of the bath liquor between 3 and 4 at the final point; then adding 4 to 6 portions of chrome tanning agent into the pre-processed acidic liquor and rotating for 2 to 3 hours and using 0.1 to 0.2 portion of magnesium oxide to process for 2 hours; raising the temperature to 43-47 DEG C and reacting for 3 hours; stopping a drumand staying overnight; rotating for 30 minutes the next day; and discharging out of the drum, stacking and then stewing for 24 hours. The shrinkage temperature of the obtained chrome-tanned leather billet is between 96 and 102 DEG C; the waste chrome-tanned liquor amount is 250-300 L./t pelt; the content of chromium sesquioxide in the waste liquor is 40-60mg/L; and the content of chloridion in thewaste liquor is 6.4-9.2g/L.