The invention relates to a telescopic device for electric power test equipment, and belongs to the technical field of power maintenance equipment. The telescopic device comprises a mounting rod for mounting a measuring unit, the mounting rod is provided with a set of angle adjusting components connected end to end, the angle adjusting component comprises a set of springs, an upper support plate and a lower support plate are respectively arranged at the two ends of the spring, and a pull cord sequentially passes through the lower support plate and the spring and the upper support plate, and themeasuring unit is connected to the upper support plate of the topmost angle adjusting component by means of the connecting member, the telescopic device further comprises a distance monitoring systemof the measuring unit. The upper support plate is tilted by the pulling rope to make an angle change of the upper support plate to adapt to various channels, thereby realizing effective measurement of the power device by the measuring unit.