The invention provides an epoxy resin high-voltage bushing testing device. The testing device comprises an oil tank, a middle flange and a bushing extraction small bushing, wherein the oil tank is a cylinder with a closed lower portion and an open upper portion, the middle flange is annular and arranged on the upper portion of the oil tank, the bushing extraction small bushing is embedded in the cylinder wall of the oil tank above the middle flange, and an insulated conductor is arranged between the middle flange and the bushing extraction small bushing for connection. The invention also provides a usage method of the epoxy resin high-voltage bushing testing device. The epoxy resin high-voltage bushing testing device and the usage method thereof have the advantages that only oil-paper capacitor type bushings can be tested previously, but now the high-voltage test requirements of the epoxy resin oil-oil drying type bushings can be met, the epoxy resin bushing testing device is in an integral structure, can be transported conveniently and is not required to be installed, and a special ladder is equipped, so that workers can go up and down to perform wiring safely, conveniently and quickly. According to the method and the special testing device, a plurality of bushings of this type are already tested successfully up till now, test data agree with factory data, and operating conditions are met.