The invention provides a building connecting node. The building connecting node comprises prefabricated parts, cast-in-place parts, connecting parts, and sealing parts, the prefabricated parts are fixedly connected through the connecting parts and forms a whole structure with the cast-in-place parts, and then the whole structure is sealed through the sealing parts. Through sequential hoisting andaccurate detection, the smooth progress of construction and the feasibility of construction operation can be ensured, and the stress requirement of the whole building is met. According to the buildingconnecting node, a prefabricated beam, a prefabricated column and a prefabricated laminated plate are fixedly connected, the cast-in-place concrete is reduced, so that the construction is simpler andmore convenient, the construction efficiency and the construction reliability are improved, a shear groove arranged in a through manner is formed in the portion, between the two rows of steel bars, of a prefabricated turnover beam, connection with the laminated plate is facilitated, and linear cracks are avoided; and in addition, the step type design is adopted by the prefabricated laminated plate, stable lap joint with the floor rib of the floor slab can be ensured, so that the stress is reasonable, and the construction safety is improved.