The invention provides an organic degrading bacterium resistant to cadmium and lead ions. The organic degrading bacterium is named as paenibacillus sp GRINM L4 in a way of classification, and is preserved in China General Microbiological Culture Collection Center (CGMCC); the address of the preservation unit is institute of microbiology, Chinese academy of sciences, No. 3, yard 1, Beichen west road, Chaoyang district, Beijing; the preservation data is September 29th, 2016, and the preservation number is CGMCC No. 13066. The strain can efficiently remove organic matters in wastewater rich in heavy metal ions, and has a large application space in the field of COD removal of heavy metal-rich flotation wastewater and power plant wastewater in the future, thus having a great market developmentprospect.