Opening and closing auxiliary device for hydrothermal reaction kettle in laboratory

The utility model discloses a laboratory hydrothermal reaction kettle opening and closing auxiliary device which comprises a kettle body limiting base and a kettle cover limiting cap, the kettle body limiting base is of a hollow structure with an opening in the top, the kettle cover limiting cap is of a hollow structure with an opening in the bottom, and a compression bolt exposure opening is formed in the middle of the top of the kettle cover limiting cap. A first limiting block is arranged at the bottom in the kettle body limiting base in the circumferential direction and matched with a first notch in the bottom of the kettle body in the circumferential direction, and a second limiting block is arranged at the top in the kettle cover limiting cap in the circumferential direction and matched with a second notch in the top of the kettle cover in the circumferential direction. The kettle body limiting seat is fixed on an experiment table through a fixing mechanism, or a handle I is arranged on the outer wall o