The invention provides carbon fiber functional composite biological filler and a production method thereof. The filler comprises fixing sleeves (2) and at least two lines (1), and one or two ends of each line (1) are fixed to one or two corresponding fixing sleeves (2). The method includes a line manufacturing procedure, a braid fixing procedure and a fixing sleeve manufacturing procedure. The carbon fiber functional composite biological filler not only has advantages and functions of normal filler for wastewater treatment but also has excellent self-lubricating performance, high and low temperature resistance and chemicals resistance, and the filler used as compression filler is high in flexibility and softness and effective in degradation during management of wastewater generated in chemical industry, pharmacy, dyeing and the like. In addition, according to data quantitative analysis, the treatment speed of organic wastewater difficult to degrade is increased by three to four times by using the filler as compared with conventional internal electrolysis treatment, and COD (chemical oxygen demand) removal rate is increased by 30%-35% under the same conditions. Further, the carbon fiber functional composite biological filler is stable in structure, high in adsorption force, quick in film forming and easy in stripping.