The utility model relates to a device for treating waste water produced during production of cyclotetramethylene tetranitramine and belongs to the field of wastewater treatment. The device for treating the waste water produced during production of the cyclotetramethylene tetranitramine comprises a neutralization tank A, an anaerobic tank, an aerobic tank A, a sedimentation tank A, an acidification tank, an electrocatalytic oxidation tank, a neutralization tank B, a sedimentation tank B, an aerobic tank B, a sedimentation tank C, an intermediate water tank, a mechanical filter and an activated carbon filter. The device for treating the waste water produced during production of the cyclotetramethylene tetranitramine has the advantages that a technology processing effect is good, process cost is low, and indexes of the waste water produced during production of the cyclotetramethylene tetranitramine by adopting the device and method provided by the utility model are optimized, wherein COD (chemical oxygen demand) can be reduced to below 50mg/L, and concentration of the cyclotetramethylene tetranitramine is less than 0.5mg/L.