Cleaning agent and cleaning method for cleaning conveying pipeline from aeration tank to secondary sedimentation tank

The invention relates to the field of papermaking sewage treatment, in particular to a cleaning agent for cleaning a conveying pipeline from an aeration tank to a secondary sedimentation tank and a cleaning method. The cleaning agent A is prepared from the following components in parts by weight: 0.5 to 2 parts of sodium hydroxide, 1 to 5 parts of sodium peroxide, 0.1 to 0.5 part of ethylenediamine tetraacetic acid, 0.1 to 1 part of a nonionic surfactant, 1 to 3 parts of ethyl acetate, 0.5 to 2 parts of acetone and 86.5 to 96.8 parts of water. Lignin and cellulose which are most difficult to decompose in a conveying pipeline from an aeration tank to a secondary sedimentation tank are decomposed by adopting a biodegradation method, using different cleaning agents and utilizing the characteristics of white-rot fungi so as to further decompose other substances, so that in the subsequent cleaning process, a high-pressure water gun does not need to be adopted any more, and the cleaning efficiency is improved. The