PURPOSE: To increase the adhesiveness of a directional electromagnetic steel plate on a glass film and to improve magnetic characteristics by forming an oxide dispersion phase in matrix iron under the glass film which is formed at the time of a normal finish annealing.

CONSTITUTION: A steel plate that has undergone the finish annealing is heat- treated in an atmosphere with the ratio of H2O partial pressure and H2 partial pressure (PH2O/PH2), that is to say, the oxidation degree of 0.05W0.70 within the temperature range of 650°CW900°C for 20W30sec so that an oxide disparsion phase on matrix iron is formed under the glass film formed at the time of finish annealing, thereby increasing adhesiveness and tension in producing cool rolling steel plate with normal process. First, a slab containing Si below 4% is heated and hot-rolled to an intermediate plate thickness, and the hot-rolled plate undergoes two times of cool-rolling with intermediate annealing or one time of cool-rolling to provide a final thickness. After that,normal decarbonizing is performed, and normal finish annealing after annealing separation agent has been applied to the plate.