Diazodinitrophenol (DDNP) is the nitro derivate of phenol and a good primary explosive. DDNP waste water contains diazo, nitro and other refractory compounds, with strong acid or strong alkali, and high toxicity. The quality analysis of waste-water produced by DDNP shows that it has a high content of nitro compounds. According to the factory practice, a biochemical and physical method together to deal with treatment of DDNP wastewater with white-rot fungi-peat is presented. When incubated, and acclimated white rot funguses are used, DDNP wastewater treatment conditions are: added amount of peat, 5% and 9%, temperature (37± 2) ℃; pH=4.5±0.5; added amount of manganese sulfate, 1 mg·L^-1; time about 7 days. Effluent results reveal that: chroma is almost zero, pH ≈ 6.0 and COD_cr ≈ 120 mg·L^-1, according with the country second emissions standars.