Abstract: The ecological distribution of microbes in water area polluted by Cd and Pb, their resistance and bioconcentration ability to these elements are studied with selective media and filter method. The results show that the variation of microbial biomass in waste water has no relation to the concentrations of Cd or Pb. The resistant microbial biomass is strongly affected by environmental temperature, its resistance to heavy metals is Pb>Cd and mould>saccharomycete>bacteria. The highest resistant concentration of Cd and Pb by mould is 20000 mg·L^-1,that of saccharomycete and bacteria is 5000mg Cd·L^-1 and 10000 mgPb·L^-1. The bioconcentration of Cd and Pb by resistant microorganism has a close relation to its resistance and the toxicity of Cd and Pb. The dominant microorganisms in Cd and Pb waste water are Erwuba, Alacligenes, Arthrobacter, Candida, Aspergillus and Cladosporinm.

Key words: Cd, Pb, Microbial ecology, Resistant microorganism, Bioconcentration