The invention discloses a connecting node between a shear wall and a beam of fully-prefabricated reinforced concrete structures, which comprises the shear wall and a prefabricated beam groove. The connecting node is characterized in that the width of the prefabricated beam groove is the same as the thickness of the shear wall; the prefabricated beam groove is concave; the shear wall is provided with a concave groove at the node; the prefabricated beam groove extends into the concave groove of the shear wall for a distance; superposed plate cast-in-place concrete is in the concave groove of the shear wall and the groove and the upper part of the prefabricated beam groove; the upper part and the lower part of the groove of the prefabricated beam groove are provided with an upper beam additional bar and a lower beam additional bar respectively, and simultaneously the upper beam additional bar and the lower beam additional bar extend into the shear wall; and a reinforcement bar in the superposed plate cast-in-place concrete above the prefabricated beam groove and a reinforcement bar of the prefabricated beam groove form a whole. The connecting node can connect the shear wall and the beam to form a whole, can bear and transfer external forces in the vertical and horizontal directions, and has a simple structure and simple construction process.