The invention relates to an ignition plate adjusting device used for a barbecue grill. The ignition plate adjusting device comprises a positioning device fixedly arranged on an ignition plate, and thepositioning device comprises a positioning bottom plate, a positioning supporting plate and a positioning connecting plate; the positioning bottom plate, the positioning supporting plate and the positioning connecting plate are fixedly connected and form integrally; the positioning bottom plate and the positioning connecting plate are perpendicularly connected with the positioning supporting plate separately, the positioning bottom plate and the positioning connecting plate are reverse in position, and a connecting hole is formed in the positioning connecting plate. Correspondingly, the barbecue grill is provided with an adjusting mechanism connected with the connecting hole through matching and connected with the connecting hole in the positioning bottom plate through the adjusting mechanism, and then the ignition plate slides on an oil collecting plate. The ignition plate is simple in structure and convenient to use; by arranging the adjusting mechanism, the ignition plate moves more conveniently on the oil collecting plate, and the using safety of an operator is further guaranteed.