Grid bottom door device and railway hopper car

The invention discloses a grid bottom door device and a railway hopper car. The bottom door device comprises two oppositely-arranged frame units, two oppositely-arranged bottom door units and a driving mechanism. Wherein the frame unit comprises an edge beam and a transverse ridge part, and a groove is formed in the edge beam; the bottom door unit comprises a transverse plate, a fixed pipe, a pull rod and an end connecting part; the two ends of the transverse plate can be inserted into the groove and can slide in the groove; the fixed pipe is arranged on the lower surface of the transverse plate in the direction perpendicular to the transverse plate; the pull rod penetrates through the fixed pipe; the end connecting part is in contact with one end of the fixed pipe and is connected with one end of the pull rod; transverse wing surface parts are arranged at the two ends of the end connecting part, and the transverse wing surface parts can be inserted into the two grooves respectively and can slide in the groov