The present invention relates to a method for adjusting forward transmission power control threshold in a mobile communication system, comprising the following steps of: setting in advance at the base station side an overload control threshold and an adjustment range of the power control threshold of sector forward transmission power; obtaining current total values of the forward transmission power of the sector; judging whether the sector forward transmission power exceeds said overload control threshold; judging whether the sector forward transmission power exceeds said adjustment range of the control threshold; dynamically adjusting the forward transmission power threshold, and so on. By the steps of pre-setting the overload control threshold and power control threshold adjustment range of the sector forward transmission power, obtaining the current total values of the forward transmission power of the whole sector and judging whether the sector forward transmission power exceeds the overload threshold and so on, the present invention realizes real-time regulation of the sector forward transmission power, thereby can track the variance of the actual forward transmission power, and ensure CDMA mobile communication system having a good communication service quality.