Research conclusions: The ballastless track structure was adopted in Harbin—Qiqihaer Passenger Dedicated Line，with the following merits：(1)It can prevent the subgrade frost heave effectively to satisfy the requirement of track regularity for running high—speed train；(2)It can solve the problem of difficult maintenance of track in winter with high maintenance cost；(3)It is easy to install and use the snow thawing equipment to guarantee the traffic safety．