The invention discloses an improved fast door control system. The improved fast door control system is characterized in that a photoelectric induction protection switch (15) is installed at the bottom end of a fast door outdoor side door frame on one side of a bin (16); a control box (14) is installed in the middle of the fast door outdoor side door frame and located above the photoelectric induction protection switch (15). An earth induction system (10) is installed on the ground at the outlet position of a truck unloading point on the other side of the bin (16), and the width of the earth induction system (10) is 1 m. The improved fast door control system and application of the improved fast door control system in the severe environment have the advantages that the problems that dust on the field is large, consequently, a sensor fails, and strong wind occurs occasionally on the field, so that a door curtain is disengaged from a rail are solved, the purpose of successfully applying a fast door in the severe environment is achieved, and the application field of a constant-open type door closing operation mode is started.