The utility model discloses a collection electric test device, including collecting ring dustcoat, axis of rotation and power device, be equipped with tapered roller bearing, clamp plate, screw rod, backup pad and two at least collecting rings in the collecting ring dustcoat, on the tapered roller bearing in the collecting ring dustcoat was fixed to the one end of axis of rotation, the other end stretched out that the collecting ring dustcoat is outer to be connected with power device, the backup pad is installed in the axis of rotation, and two at least collecting rings pass through the screw rod to be fixed form the stratiform between bottom plate and clamp plate, it has the bracing piece to distribute along collecting ring outer end circumference in the collecting ring dustcoat, be equipped with on the bracing piece with every collecting ring complex conducting ring, have the brush holder according to circumferencial direction evenly distributed on every conducting ring, be equipped with on every brush holder with collecting ring rubbing contact's carbon brush, still include the copper bar, the copper bar is fixed on the collecting ring, through the copper bar intercommunication between collecting ring and the collecting ring. The utility model discloses the accessible carries out high voltage and high -current test respectively to at least two -layer different material collecting rings to calculate corresponding electric loss data.