The invention discloses a circulatory learning method for an angle measuring error curve of an anemorumbometer. The circulatory learning method comprises the following steps that 1, after a first learning cycle is finished, an operation cycle and a new learning cycle are started simultaneously, and the new learning cycle and the operation cycle are conducted in parallel; and 2, when a new angle measuring error curve b calculated out through the new learning cycle is greater than or equal to 5% of the average relative error of an original angle measuring error curve a, the original angle measuring error curve a is replaced by the new angle measuring error curve b for compensating for. Due to the fact that the learning cycle can be circularly conducted for the anemorumbometer through the circulatory learning method, and when the angle measuring error curve is changed, the angle measuring error curve can be timely corrected and compensated for so that the situation that the power generation efficiency is reduced due to invalidation of the original angle measuring error curve can be relieved. For example, after circulatory learning is conducted for a draught fan in a wind field in Hebei Province, about 1.2% power loss of the draught fan can be reduced.