The invention discloses an automatic kettle body and upper connector assembly machine which comprises a kettle body pre-positioning mechanism for rotating kettle bodies to preset positions, a kettle body transfer mechanism for transferring the pre-positioned kettle bodies to different assembly lines, a kettle body feed mechanism for transferring the pre-positioned kettle bodies to the kettle body transfer mechanism, a kettle bottom dispensing mechanism for dispensing heat conduction silicone grease to kettle bottoms, an upper connector conveying mechanism for conveying and positioning upper connectors to upper connector assembly positions on the kettle bodies, a screw locking mechanism for assembling and fixing the upper connectors on the kettle bottoms, a lock floating detection mechanism for detecting if screws have a lock floating phenomenon, and a blanking and conveying mechanism for removing assembled qualified products and unqualified products from the assembly lines. The automatic assembly machine raises an automation degree of the kettle manufacturing industry, improves production efficiency and product quality, and also lowers labor cost.