The invention discloses a structure for protecting a municipal pipeline. The structure is characterized in that stress relief holes are formed in the position away from a newly-built building by 15-20 meters, freezing sheets are arranged at the position away from the stress relief holes by 7-9 meters, are respectively of an arc shape and are made of steel pipes, and every two adjacent freezing sheets are spaced by 150-200 millimeters; triangular blade feet are arranged at the lower sections of the freezing sheets so that the freezing sheets can sink conveniently; the freezing sheets are arranged in an arc shape and form an arc-shaped freezing wall after freezing construction is completed; temperature measuring pipes are arranged at the two ends of the freezing sheets at the ends, and the depth of the temperature measuring pipes is equal to the depth of the freezing sheets; an anti-frostbite swelling ditch is formed in the position away from the newly-built building by 35-50 meters; three cement-mixed piles are arranged at the joint part of the pipeline in a meshing mode, and bamboos are inserted into the cement-mixed piles.