The resource-oriented utilization of agricultural solid wastes as biochar is eco-friendly and cost-effective, but the application of biochar for Cd-polluted soil remediation hindered by their efficiency and complicated field condition. This study used three types of raw materials i.e. oil tea (Camellia oleifera Abel) shell, reed straw, and urban sludge to prepare pyrolysis biochar. Meanwhile, a Cd highly resistant Proteus mirabilis Ch8 isolated from Robinia pseudoacacia L. rhizosphere was immobilized to form a biochar-bacteria composite for the remediation of Cd-polluted soil. The pyrolysis configurations and adsorption curves were studied and sludge biochar prepared at 700 °C was the most suitable for Cd adsorption which could be further accelerated to 79.97 mg g