Combustion boiler convenient to clean filter screen

The invention discloses a combustion boiler convenient to clean a filter screen. The combustion boiler comprises a boiler body; the bottom of the boiler body fixedly communicates with a connecting pipe; a connecting rod is fixedly mounted at the bottom of the boiler body; a treatment box is fixedly mounted at the bottom of the connecting rod; the end, far from the boiler body, of the connecting pipe penetrates through the treatment box, and extends into the treatment box; a mounting plate is fixedly mounted at the top of the inner side of the treatment box; a driving motor is fixedly mounted on the back surface of the inner side of the treatment box; an output end of the driving motor is fixedly connected with a rotating rod; and the end, far from the driving motor, of the rotating rod penetrates through the mounting plate, and extends to the outer side of the mounting plate. The driving motor drives the rotating rod to rotate, and the rotating rod drives a turntable to peripherally move, so that a guide rod