A back-flushing plate (4) of a multifunctional oral care tool. The back-flushing plate (4) is provided at a back end of brush heads (1) and has an end portion lower than an end portion of the brush heads (1). A pair of brush heads (1) is driven to rotate by a pair of transmission rods (5), such that the brush heads produce a powerful suction flow. Sucked water splashes onto the back-flushing plate and generate a powerful flush flow, thereby attains a goal of flushing the oral waste away. It solves a problem of deep cleaning of furs and also solves a problem of waste liquid, such as tooth-brushing foam, remaining in an oral cavity.一種多功能口腔護理工具的反沖板，該反沖板設置在刷頭後端，且其端部低於刷頭端部，一對刷頭在一對傳動杆的帶動下旋轉，使得刷頭產生強力吸流，被吸上來的水打到反沖板上，產生強力沖流，進而達到沖走髒物的目的。其克服了舌苔深層清潔的難題，同時也克服了口腔內殘留牙刷沫等廢棄液體的問題。
