The invention discloses natural-color fuzzy bamboo pulp with high bacteriostatic activity. The natural-color fuzzy bamboo pulp is 25-30%ISO (International Standardization Organization) in whiteness degree, is 0.25-0.35kPa m<2>/g in bursting strength, is 17-21cm<3>/g in dry filling power, is 6-6.5s in water absorption time, is 8.9-9.8g/g in water absorption capacity, is 0.86-3.79mm in average fiber length and is 0.009-0.022mm in average fiber width. A preparation method of the natural-color fuzzy bamboo pulp comprises the steps of pulping raw materials, cooking, washing, modifying and drying, wherein the washing step comprises coarse selection by a vibrating screen, black liquid extraction by a vacuum pulp washer, fine selection by a pressure screen, dedusting by a residue removal and pulp washing by a vacuum pulp washing machine. The natural-color fuzzy bamboo pulp has long fiber length, high flexibility and good water-absorbing ability and water-retaining property, has soft and fluffy texture and strong antibacterial property, can keep the 100% natural color of the bamboo fiber and can remarkably improve the quality of the down-stream products; and the preparation method has the characteristics of simplicity in operation, convenience in production, low cost and environment protection.