Abstract: With the statistic analysis on the fault type and cause of the hydraulic powered support, the detection plan to rapidly determine the fault location under th e condition of non-disassembled powered support was provided According to the fault cause, a new portable intelligent fault detector of the hydraulic powered support was designed based on the MPS430F427 high performance micro processor.With the application of the detector, an accurate and rapid fault positioning could be condu cted on the hydraulic powered support with a fault occurred and the fault degree could be accurately detected.Meanwhile the working status judgement was conducted on the hydraulic powered support in operation, the detection results with the site printing could be automatically provided.