The utility model provides a polyurethane railway roadbed piece. This polyurethane railway roadbed piece includes: the polyurethane piece includes that railway ballast and dispersion bond into the polyurethane of block in the railway ballast clearance and with the railway ballast. This polyurethane railway roadbed piece is the polyurethane railway roadbed piece that polyurethane bondd and solidifies the railway ballast and form that passes through who prepares in advance. Because this polyurethane railway roadbed piece makes before laying at the scene in advance, can mill or workshop prefabricate clean at the environment, temperature steady form, its execution conditions are convenient, and then make the polyurethane piece utensil tangible form that arrives more regular, more regular, andpolyurethane piece mutual independence behind the scene is laid to advantage that the structure is more closely knit, and its polyurethane railway roadbed reliability of laying is high, the durabilityis good, and conveniently operates the maintenance maintenance of in -process.