Sample preparation device and sample preparation method of carbon fiber multifilament

The invention relates to the technical field of carbon fibers, and discloses a carbon fiber multifilament sample preparation device and a sample preparation method thereof.The sample preparation device comprises a control system, a creel, a gum dipping tank, a pre-forming device, a mold, a traction device and a fiber cutter, and the creel, the gum dipping tank, the pre-forming device, the mold, the traction device and the fiber cutter are sequentially arranged; and the control system is used for controlling the traction device to pull the fiber tows and controlling the fiber cutter to cut the fiber tows. According to the sample preparation device, automation in the carbon fiber sample preparation process is realized, human factors can be reduced to the greatest extent, and the consistency of process conditions such as tension, gum dipping time and a gum control process in the test process is ensured, so that the tensile strength of the carbon fiber multifilament can be objectively evaluated. 本发明涉及碳纤维技术领域，公开了一