The invention relates to a ballastless track structure. The ballastless track structure comprises a subgrade bed surface layer, base plates and a subgrade bed bottom layer, wherein the subgrade bed surface layer is formed by an asphalt concrete material; the base plates are arranged above the subgrade bed surface layer and obtained by pouring reinforced concrete materials; and the subgrade bed bottom layer is arranged under the subgrade bed surface layer and is formed by graded broken stones; the ballastless track structure is characterized by further comprising reinforcing units used for reinforcing connection between the subgrade bed surface layer and the subgrade bed bottom layer; the reinforcing units comprise fastening units arranged in positions, corresponding to the two sides of a structural joint of the two base plates, on the subgrade bed surface layer; the fastening pieces are inserted into the subgrade bed bottom layer; and the fastening pieces are formed by a material withrigidity of higher than the rigidity of the asphalt concrete material and the rigidity of the graded broken stones.