The invention discloses a distillation kettle with a buffer function, which comprises a bottom frame and a kettle body, and the bottom frame and the still body are provided with a lifting device, a liquid supply device, a shunting device, a displacement device, a transmission device, a connecting device and a driving device; the kettle body is connected to the bottom frame through bolts, a supporting frame is fixedly connected to one side of the bottom frame, a mounting box is fixedly connected to one side of the supporting frame, and a protective ceiling is fixedly connected to the position,away from one side of the kettle body, of the mounting box. Through cooperation of the lifting device, the liquid supply device, the flow dividing device, the displacement device, the transmission device, the connecting device and the driving device, the automation degree of the distillationkettle in the working process is improved, distillation components in the distillationkettle can be protected, the distillation components in the distillation kettle cannot be directly impacted by liquid, and corrosion and impact damage of the distillation components are avoided; meanwhile, the problem thatthe liquid leaks when being injected into the distillation kettle can be avoided.