A micro erbium-doped fiber super-fluorescent light source is proposed and optimized to meet the requirements of fiber optic gyroscope(FOG). The size is Φ 50 mm × 15 mm. By using the optimized optical design, gain flat filter and some control methods for laser pump and erbium fiber, high performance and stable super fluorescent light source is achieved. The output power is more than 13 dBm. Spectral bandwidth is widen to more than 35 nm. The power fluctuation is less than 1% and the change rate of mean wavelength is less than 5×10－6. The power and temperature stability of the super-fluorescence light source are measured as well. Both the spectrum and output power of micro super-fluorescent light source can withstand severe temperature impact and meet FOG requirements.