The utility model discloses a frost zone area high -speed railway road bed foundation bed lays the heated board that adopts fibre foam concrete prefabricated on foundation bed top layer upper portion to reach heat retaining purpose, reduce the temperature to the destruction of road bed, increase of service life. Guarantee track structure's high ride, stability and durability. This foundation bed is from top to bottom including being supporting backing plate, heated board, foundation bed top layer, foundation bed bottom, the following part of bottom in proper order, embankment body both sides set up height such as berm, berm and embankment. Process that the heated board was laid on the foundation bed top layer to the adoption is simple, the performance is better, can guarantee its durability under long -term dynamic load effect.