The acid solution remaining in the formation after acid rock reaction in acid compression construction can still adsorb, retain and block rock pores after glue breaking, causing damage to the reservoir, affecting the seepage capacity of the reservoir, leading to the reduction of single well productivity and economic benefits. In order to clarify the influence of residual acid damage on carbonate reservoir of Majiagou Formation in Daniudi gasfield, the residual acid damage experiments on matrix, micro fracture and acid erosion fracture were carried out through the configuration and construction of acid system, and the damage laws were analyzed from micro and macro perspectives. The experimental results show that residual acid has a high damage rate to matrix. Residual acid enters matrix and pollutes core in the form of clogging pores, and the damage rate of residual acid is about 30%. The residual acid remains on the surface of micro-cracks, and the greater the permeability, the less damage; residual acid damage rate is between 10% and 20%.Acid; etched cracks are almost unaffected by residual acid. Therefore, the damage of residual acid is mainly caused by blockage, and the adsorption damage is relatively low.