The invention discloses a method for treating lead-containing waste water by an immobilized endogenous bacteria biological adsorbent. The method comprises the following steps of adding the immobilized endogenous bacteria biological adsorbent into the lead-containing waste water; performing adsorption under the condition of constant temperature oscillation so as to remove lead in the waste water. The preparation of the immobilized endogenous bacteria biological adsorbent comprises the following steps of (1) preparing modified carbon nanotubes; (2) adding water into polyvinyl alcohol, sodium alginate and the modified carbon nanotubes; performing uniform mixing; preparing an immobilized substrate; (3) uniformly stirring endogenous bacterium suspension liquid and immobilized substrates; extruding the materials into a calcium chloride solution; performing cross linking reaction. By using the method, the strong removal capability is realized on Pb<2+> in the waste water; the adsorption volume is great; the adsorption efficiency is high; the stability is high; the repeated utilization rate is high.