The invention discloses a carbon fiber heating piece and a preparation method thereof. The carbon
fiber heating piece comprises
electrode leads, and a lower insulated
coating layer, a carbon
fiber layer in a net-shaped structure,
electrode current-carrying bars and an upper insulated
coating layer which are arranged from bottom to top, wherein the
electrode current-carrying bars are arranged at two ends of the carbon
fiber layer, and the electrode current-carrying bars are electrically connected with an external power source through the electrode leads. The preparation method comprises the following steps: carbon fiber wires are distributed on the lower insulated
coating layer to form the carbon
fiber layer in the net-shaped structure, the electrode current-carrying strips are pressed on two ends of the carbon
fiber layer, the upper insulated layer is laid, and after bonding treatment, the electrode leads are welded at the corresponding two ends of the electrode current-carrying bars. The preparation process of the heating piece is simple, the production cost is low, and the net-shaped carbon fiber wire structure formed by a plurality of specially arranged
diamond lattices has the advantages of simple structure, strong reliability, small difference between heated zones, large heating area and the like. The carbon fiber heating piece is suitable for being applied in the fields of heating and health care of far-
infrared radiation.