The invention discloses an unbonded prefabricated beam column cross-shaped joint, and belongs to the technical field of structural construction. The structure comprises a prefabricated concrete lowercolumn, a prefabricated concrete upper column, a prefabricated concrete beam plate, a prestressed steel strand, a foundation structure, an anchorage device and bolts; and the structure is formed in the mode that the prefabricated concrete lower column, the prefabricated concrete beam plate and the prefabricated concrete upper column are hoisted together in sequence from bottom to top, the prestressed steel strand is pre-buried in the foundation structure and penetrates through a structure system through hole channels of the columns, beam plates can be continuously arranged on the upper column,tensioning is conducted every five layers and conducted on the top end of the uppermost column, and lastly the bolts are applied to adjacent prefabricated beams. According to the unbonded prefabricated beam column cross-shaped joint, the connecting characteristics of wood structure mortises and tenons are used for reference, and therefore the higher the pressure is, the more compact the structureis; and in addition, prefabrication is really achieved, the construction period is greatly shortened, the bearing capacity is high, the overall performance is good, and the unbonded prefabricated beam column cross-shaped joint can be reused, is green and environmentally friendly and has the quite high economic benefit.