Low-noise high-stability crystal oscillator

The invention relates to the technical field of crystal oscillators, and discloses a low-noise high-stability crystal oscillator, which comprises a ceramic housing, a constant-temperature housing arranged in the ceramic housing, and a noise reduction housing arranged outside the ceramic housing, the ceramic housing comprises a ceramic base provided with a plurality of conductive pins, and a ceramic cavity cover mounted on the surface of the ceramic base; the constant-temperature housing comprises a constant-temperature base and a constant-temperature cavity cover mounted at the top of the constant-temperature base; an integrated circuit board, a temperature control circuit board, a quartz wafer and an oscillator circuit board are arranged on the surface of the constant-temperature base; an assembly electrode is embedded in the quartz wafer, the integrated circuit board, the temperature control circuit board, the quartz wafer and the oscillator circuit board are all arranged in an inner cavity of the constant-