The invention provides a prestressed concrete rail board die manufactured through a bidirectional pre-tensioning method. The prestressed concrete rail board die is characterized by comprising a rail board bottom die, rail bearing tables, force bearing side dies, force bearing end dies, force plates, prestressed rebar holes, a plurality of tensioning connecting rods, and a plurality of tensioning force locking wedge blocks, wherein rail bearing grooves are uniformly distributed in the rail board bottom die; the rail bearing tables are uniformly distributed and are embedded in the rail bearing grooves; the force bearing side dies are symmetrically arranged on the two sides of the rail board bottom die; the force bearing end dies are symmetrically arranged on the other two sides of the rail board bottom die; the force plates are arranged on the force bearing side dies and the force bearing end dies; the prestressed rebar holes are distributed in the force bearing side dies and the force bearing end dies; the plurality of tensioning connecting rods are inserted on the two sides of the force bearing side dies and the two sides of the force bearing end dies; the plurality of tensioning force locking wedge blocks and the tensioning connecting rods are in one-to-one correspondence; and one of the tensioning force locking wedge blocks is fixed to the force bearing side dies, and the other of the tensioning force locking wedge blocks is inserted into the connecting rods.