Three key technologies of planar lightwave circuit (PLC) opto-electronic integrated devices for passive optical network (PON) are introduced briefly, including surface mounted photonics, passive alignment of the laser diode (LD), photo diode (PD), fiber and waveguide, as well as non-hermetic and high reliable plastic packaging. The coupling of optical fiber and waveguide is analyzed in theory, thus through simulation fitting curves it infers that the 3 dB tolerance of z offset of the fiber and waveguide is 70 μm, and the 3 dB tolerance of angle offset is less than 5°. The results of sample test show that the sensitivity is (-30.7±0.3) dBm in high temperature, (-31.3±0.2) dBm in normal temperature, (-31.2±0.2) dBm in low temperature. Optical power in normal temperature is (2.0±0.5) dBm with clear eye diagram. The results show the PLC opto-electronic integrated device has good stable performance.