The utility model relates to an insulating tubular busbar partial discharge detector system of 10kV, its technical characterstic is: show the ware including electric capacity type sensor, ultrasonic sensor, synchronous voltage signal pickup apparatus, filter amplifier device, main control system and touch screen display, two metal foil electrodes of electric capacity type sensor are attached in the both sides of awaiting measuring insulating tubular busbar respectively to detect the impedance phase with the differential circuit and be connected constitution difference formula detection loop, output that the differential circuit detected impedance, ultrasonic sensor, synchronous voltage signal pickup apparatus is connected with capacitor filter amplification device, ultrasonic wave filtering amplification device, voltage filtering amplification device's input respectively, the output of above -mentioned three filter amplifier device all is connected with the main control system, the main control system shows with touch screen display that the ware is connected. The utility model discloses integrated a plurality of sensors can detect insulating tubular busbar's partial discharge type and the degree of discharging quick, accurately, and portable.