Abstract: A barbecue grill includes a charcoal tray having a plurality of upward extended supporting brackets, which are formed at different heights with at least two locating notches each; a wire mesh supported on the locating notches at different heights depending on actual needs; and a supporting leg assembly located below the trip tray. The supporting leg assembly includes a primary leg and at least two secondary legs, all of which are length-adjustable sectional legs consisting of a plurality of detachably connected sections each, and a binding element screwed to the primary leg at a predetermined point for loosely binding the primary leg and the secondary legs together. The primary and secondary legs are screwed at upper locking ends to holding-down devices provided at an underside of the charcoal tray, such that the legs bound by the binding element are inclined to outward stretch lower ends in different directions.