The invention relates to a method of direct station obtains breaking point in TD-SCDMA system; the method includes steps as following: when it is started, the direct station is switched to the state of receiving down-bound signal to receive down-bound signal; the direct station captures the time that down-bound pilot frequency signal arrives at the direct station; from the hour that the TS2 time slot ends, the hour that every time slot ends is supposed as possible time of the second switching point; determining whether the switching section is a real time switching section; processing the next time slot; when the direct station receives the up-bound pilot frequency signal for the second time, then it is recovered to normal condition to execute the ascending-descending switch of step 1-step 6. The invention adopts method of base band synchronization to obtain the information of breaking point automatically without distribution with benefactor base station, it can be worked at system that the distribution mode of ascending-descending time slot is continuously changeable, the engineering is easy to install, the cost is low, and the interference of noise to areola can be decreased efficiently.