The invention discloses an oil pumping well rod rotating device and belongs to the field of oil field machinery. According to the oil pumping well rod rotating device, a support is in a square pipe shape, and an upper rotation bearing hole and an upper transmission bearing hole are formed in a top plate; a lower rotation bearing hole and a lower transmission bearing hole are formed in a bottom plate, and bearings are fixed in the upper rotation bearing hole, the upper transmission bearing hole, the lower rotation bearing hole and the lower transmission bearing hole correspondingly; a rotary shaft is fixed in the upper rotation bearing hole and the lower rotation bearing hole, and a transmission shaft is fixed in the upper transmission bearing hole and the lower transmission bearing hole; atransmission gear and a driven gear are located in a square inner cavity of the support and are engaged with each other, and the rotary shaft and the transmission shaft are sleeved with the driven gear and the transmission gear correspondingly; a first supporting shaft and a second supporting shaft are arranged in the square inner cavity, and the first supporting shaft, the second supporting shaft and the rotary shaft are sequentially arranged at intervals; and a reversal clamp comprises an annular head mounted on the first supporting shaft in a sleeving mode and an arc-shaped stop block, andthe two ends of a spring are fixed to the second supporting shaft and the arc-shaped stop block correspondingly, so that the free end of the arc-shaped stop block stretches into a tooth groove of thedriven gear, rotates in the forward direction and conducts stopping in the reverse direction along with the driven gear. The oil pumping well rod rotating device saves time and labor, and the safetyis high.