The invention discloses a method for removing ammonia nitrogen from artificial leather manufacturing waste water, which comprises the following steps: 1, performing coagulating sedimentation pretreatment of the artificial leather manufacturing waste water by adding aluminium polychlorid; 2, discharging the pretreated waste water into a first hydrolysis acidification tank to perform hydrolysis acidification; 3, discharging the waste water into an aerobic tank after the hydrolysis acidification treatment to perform aerobic aeration treatment; 4, discharging the effluent of the aerobic tank intoa middle settling tank to remove suspended matters; 5, discharging the effluent of the middle settling tank into a second hydrolysis acidification tank to perform secondary hydrolysis acidification treatment; 6, discharging the effluent of the second hydrolysis acidification tank into a oxidation ditch to perform plugflow aeration treatment; 7, discharging the effluent of the oxidation ditch intoa second settling tank to remove the suspended matters; and 8, discharging the effluent of the second settling tank into an eco-pond to perform ecological treatment and directly discharging the processed waste water. The method overcomes the drawbacks of undesirable denitrification effect, unstable and nonstandard effluent, and the like of the prior processing art and has the advantages of simpleand convenient operation, low operation cost, high impact load resistance, and the like.