The power control parameter is one of the important performance parameters in GSM system.In this paper
the influence of the power control parameter on the network indicators is expatiated
with a case of adjustments of the power control parameter on the base station such as Tangxian Xiaomazhuang DCS1800.The paper analyses the power control parameters in different frequency bands
and proposes the problem must be pay attention when a new base station is used in the process of network optimization.