The core module of photoelectric coupler is optical receiver chip. A kind of radiation-hardened optical receiver chip design is introduced, and the circuit is based on 0.5 μm standard Complementary Metal Oxide Semiconductor(CMOS) technology, which consists of Transimpedance Amplifier(TIA), reference, comparator, and so on. The circuit is hardened in radiation by circuit structure and layout design. Results indicate that the chip performs well when the total ionizing dose attains to 200 krad(Si). The chip data transfer rate can be up to 10 MBd, and its high input current ranges from 6 mA to 18 mA.