The invention relates to a method for evaluating acid tolerance of concrete. The method includes: 1), preparing concrete strength testing pieces and acidization depth testing pieces; 2), maintaining the testing pieces in a standard maintaining chamber for 26d, dry-maintaining the testing pieces for 2d, disposing the testing pieces into mixed acid liquid for soaking, taking out the testing pieces for drying for 2d after being soaked for 5d each time, measuring compressive strength X (t) of a group of the concrete strength testing pieces and width b (t) of un-corroded parts of a group of the acidization depth testing pieces after four circulating periods of soaking-drying; 3), calculating concrete acid-corrosion-resistant coefficient Q according to the obtained compressive strength X (t); 4), calculating concrete acidization depth d according to the width b (t) of the un-corroded parts; 5), dividing concrete corrosion-resistant grades into I, II, III and IV according to data conditions of Q and d, and evaluating acid-corrosion-resistant grade, acid resistance and suitable environment acting grade of concrete according to the concrete corrosion-resistant grades.