Introduction  With the improvement of people's awareness of environmental protection, noise control in the gas turbine plant has become important in environmental protection. As a huge industrial building group of the gas turbine plant, how to reduce its noise and its impact on the environment inside and outside the plant has become the focus of environmental protection and noise reduction design of the gas turbine plant.

  Methods  After analyzing the noise characteristics of the cooling tower, taking the layout of cooling tower group in Dongguan gas turbine power plant as an example, the cooling tower group was modeled by SoundPLAN.

  Results  According to the simulation results, the noise control effects of different schemes of cooling tower groups are analyzed, and the advantages and disadvantages of each noise control scheme are put forward.

  Conclusion  The proposed noise reduction scheme of the cooling tower group can be used as a reference for the design of similar power plants in the future.