The invention discloses a wading pier protection device used for reducing impact of a stream on a pier. The wading pier protection device comprises hoops detachably connected to the pier in a fastenedmode, a guide plate used for diving river water and connecting devices for connecting the guide plate with the hoops, the guide plate is composed of two fixedly-connected flat plates, the horizontalcross section is of a V shape, and the size is linearly increased from top to bottom; and supports fixedly connected with the two flat plates of the guide plate are fixedly arranged in a V-shaped included angle of the guide plate, and the supports are detachably and fixedly connected with spiral anchor stocks inserted in the bottom of a riverbed. The wading pier protection device is fixedly installed on the water facing side of a base of the pier, the stream can be directly divided to the two sides through the guide plate, the base of the pier is directly prevented from being impacted by the stream, a vortex is generated by the stream in the position of the pier, so that the huge lateral force of the stream is completely prevented from acting on the base of the pier, and the purpose of protection is achieved.