The invention discloses a nine-connecting-plate connective tensioning construction method for a base bed, belongs to the technical field of pavement construction for connective track slabs, and comprises the process steps of connecting and tensioning lower-layer prestressed reinforcement, connecting and tensioning upper layer prestressed reinforcement of a nine-connecting-plate connective track slab and the like. The method greatly improves the efficiency of connection and installation between the track slabs and the efficiency of tensioning, so that the construction efficiency of a ballastless track is improved and operation is simple; the track slabs are very convenient to maintain after being put into use; at least three track slabs can be removed; and simultaneously, a prestressing force also can be recovered after replacement.