The invention discloses a stirring kettle-based carbon nano-tube slurry preparation system. The stirring kettle-based carbon nano-tube slurry preparation system comprises a stirring kettle, a sand mill and a buffer barrel; the stirring kettle comprises a double-layer bracket; a motor is detachably arranged on a first bracket and is connected with a rotating shaft; a storage tank is rotatably arranged on the rotating shaft and rotates together with the rotating shaft; an air inlet valve, an air outlet valve and a material inlet valve which are communicated with the external and the interior of a tank body are arranged on the tank body of the storage tank; the air inlet valve is communicated with the interior of the tank body of the storage tank and a protective gas source which is arranged out of the tank body; the air outlet valve is communicated with the interior of the tank body of the storage tank and a vacuum pump which is arranged out of the tank body. According to the stirring kettle-based carbon nano-tube slurry preparation system, when materials are mixed, the storage tank is driven to rotate through the motor so that the materials in the tank body are mixed uniformly; moreover, when the storage tank rotates, the tank body is arranged in the bracket, so that the tank body can be prevented from colliding peripheral equipment in a rotating process, and a certain protective effect is achieved; the bracket is arranged in a double-layer detachable structure, so that the motor and the tank body are convenient to detach, and the maintenance and detachment are facilitated.