The invention relates to a biological-based porous carbon sound absorption composite material, which is characterized by being prepared from the following raw materials in parts by weight: 50 to 80 parts of SBS (styrene-butadiene-styrene block copolymer) and PP (polypropylene) blends, 1 to 20 parts of biological based porous carbon, 0.1 to 2 parts of coupling agents and 0.1 to 2 parts of antioxidants. The related biological based porous carbon material uses natural bamboo or bamboo shoot as raw materials; the preparation process is simple; the large-scale industrial production can be realized;the prepared SBS/PP sound absorption composite material has excellent mechanical property and sound absorption and sound isolation characteristics, high production values and use values, and wide market prospects.