For the problem of insufficient movement intensity of working substance at low engine speed and low load, the new intake strategy based on electromagnetic valve train was put forward to improve engine fuel economy. The strategy allowed the most charge air into cylinder at the early stage of intake to prevent the pumping loss and used the small lift to improve the movement intensity of gas. Compared with other strategies, the new strategy could lead to a better balance between pumping loss and movement intensity so that engine fuel economy and emissions could improve at low and medium engine speed and load.