The utility model provides a many information detection means of power transformer winding deformation state, belongs to electrical equipment failure diagnosis technical field. The utility model discloses a detect power transformer frequency characteristic, detect high -low pressure side electric current, voltage and phase angle, detect the supersound signal, detect the vibration signal, realize that winding deformation state's on -line measuring, trouble do not detects mutually, fault location detects and fault type detects, the detected signal simplification has effectively been solved, the problem of power transformer winding operation conditions, fault location and type can't be effectively detected. The utility model discloses a voltage transformer, current transformer, ultrasonic transducer, vibration sensor, signal conditioning circuit, AD converting circuit and central processing unit, voltage transformer, current transformer, ultrasonic transducer and vibration sensor's output links to each other with signal conditioning circuit's input, and signal conditioning circuit's output links to each other with central processing unit's input through AD converting circuit, and central processing unit's output links to each other with communication bus.