Corrosion-resistant coated sucker rod

The utility model relates to the technical field of sucker rods, and discloses a corrosion-resistant coated sucker rod which comprises a sucker rod body, the top end of the sucker rod body is fixedly connected with an upper connecting piece, the top of the upper connecting piece is fixedly connected with a sealing ring, the inner wall of the upper connecting piece is provided with an internal thread, and the inner wall of the upper connecting piece is provided with an external thread. A centralizing ring is connected to the outer wall of the sucker rod body in a sliding mode, a threaded ring is connected to the outer wall of the centralizing ring in a threaded mode, a fastener is fixedly connected to the bottom end of the centralizing ring, a lower connecting piece is fixedly connected to the bottom end of the sucker rod body, and the lower connecting piece is matched with the fastener. According to the sucker rod, the sealing ring of one sucker rod body is matched with the sealing groove of the other sucker