PCS optical repeater according to the present invention includes a master gain controller to gain control of the high-frequency signal input from the base station, and an optical transceiver for converting the high frequency signal received from the master gain controller into an optical signal, each module of the control and slave gain controller for adjusting the gain of the optical transceiver, the high frequency signal input from the optical transceiver for converting the optical signal transmitted from the master and an optical transceiver of the master consisting of MCU for supplying power to the high-frequency signal and, a power amplifier for amplifying a radio frequency signal received from the slave the gain controller, to transmit a radio frequency signal input through the duplexer and a duplexer of the slave to remove the noise of the amplified high-frequency signal to slave the gain controller and a receiver for, the MCU Communicating, and in the PCS repeaters having a slave consisting of PSU to supply power to the SCU with each module for controlling each module, and employing a notch filter in order to remove the noise, the duplexer, the PSU as the SFCU and the power amplifier for controlling the operation of a fan for heat dissipation and a slave employing a low power amplifier. The subject innovation is, it is possible to reduce the production costs by replacing the high-power amplifiers are expensive in price by price low power amplifier, there is an advantage that can generate a good spurious characteristic output signal.