The invention discloses a rotary grille trash-removing machine with a conveniently-changed harrow tine. The rotary grille trash-removing machine with the conveniently-changed harrow tine comprises an accommodating block. A connecting block is movably and internally connected with the accommodating block, the right end of the connecting block penetrates through the accommodating block and is fixedly connected with a vertical plate, a harrow tine body is fixedly connected with the right side of the vertical plate, an undertaking rod, located on the top portion of the connected block, is movably and internally connected with the accommodating block, the top end of the undertaking rod penetrates through the accommodating block and extends to the external portion of the accommodating block, a limiting rod is movably connected with the bottom portion of the undertaking rod, and a limiting groove, located at the bottom portion of the connecting block, is formed in the accommodating block. According to the rotary grille trash-removing machine with the conveniently-changed harrow tine, the harrow tine is conveniently changed by arranging the accommodating block, the connecting block, the vertical plate, the harrow tine body, the undertaking rod, the limiting rod and the limiting groove, and thus the harrow tine can be quickly changed by the maintenance personnel after the harrow tine is broken, trash-removing efficiency of the rotary grille trash-removing machine can be improved, and the rotary grille trash-removing machine can be used by people conveniently.