The invention discloses an automatic lifting mechanism of a bobbin creel. The automatic lifting mechanism comprises a slewing mechanism and a double acting cylinder, a support is fixed to a textile machine frame, a positioning shaft is arranged at the upper end of the support, a cylinder installation shaft is arranged at the lower end of the support, a slewing seat is hinged to a positioning shaft, the end of a piston rod of the double acting cylinder is hinged to the upper corner of the sector edge of a slewing plate, a base is hinged to a cylinder installation shaft, the end of a piston rod of a lifting cylinder is hinged to the lower corner of the sector edge of the slewing plate, and a cylinder seat of the lifting cylinder is hinged to the cylinder installation shaft. The automatic lifting mechanism is compact in structure and fast in response; the lifting cylinder replaces a complex clutch component, an air supply system is controlled to be turned on and off via electric signals, and the automatic lifting mechanism is convenient and quick to operate and high in automation degree; when the size of yarn reels changes, the bobbin creel lifts, response time of resetting is adjusted by only adjusting air supply pressure, and simplicity and convenience are achieved.