The utility model discloses a half flexible eddy current inspection array energy conversion device of hydroelectric generator magnetic pole connectiong lead, including transducer output interface, transducer skeleton, detection array element and gasket, detect array element and divide two ranges, the stagger arrangement is arranged, the width between centers 15mm of two arrays unit, the magnetic conduction shell of every array element all is equipped with the three coil grooves that parallel and installs the magnetic core array respectively and organize the adjacent center distance 3mm of magnetic core coil group that winds around magnetic core coil, winding magnetic core coil group in the middle of single array element and being 85 circles for exciting coil group, the number of turns, single array element both sides are organized to receiving coil group around magnetic core coil, and the number of turns is 160 circles, transducer central frequency 100KHZ. The utility model discloses after piercing through 4-5mm of work piece insulating layer, have higher detectivity and resolution ratio, and the flexible lining piece enables manual sweeping and look into more steadily, the influence of greatly reduced lift -off effect to detecting can be swift to magnetic pole connectiong lead, high -efficient, sensitivity is high, the all standing formation of image detects.