An embodiment of the invention discloses a crystal oscillator circuit, which comprises a crystal oscillator module and an accelerating oscillation starting module, wherein the crystal oscillator module comprises a first current source, a first current mirror and a negative resistance device; the input end of the first current mirror is electrically connected to the first current source, the outputend of the first current mirror is electrically connected to the first connection end of the negative resistance device, and the second connection end of the negative resistance device is grounded; the accelerating oscillation starting module comprises an amplification unit, a switch unit and a peak detection unit; the control end of the amplification unit is electrically connected to the first current source, the first connection end of the amplification unit is electrically connected to the first connection end of the switch unit, and the second connection end of the amplification unit is electrically connected to the first level end; the second connecting end of the switch unit is electrically connected to the first connection end of the negative resistance device, and the control endof the switch unit is electrically connected to the output end of the peak detection unit; and the input end of the peak detection unit is electrically connected to the control end of the negative resistance device. According to the technical scheme provided by the embodiments of the invention, the problems that the existing crystal oscillator circuit is low in oscillation starting speed and largein phase noise can be solved.