The invention relates to the field of solid fuel preparation and in particular relates to a stone remover for a biomass molding fuel production system. The stone remover comprises a stone removing tank, wherein the stone removing tank is internally provided with a feeding box, an ejection removal mechanism, a power mechanism and a splitting plate; an outlet is formed in the stone removing tank; the ejection removal mechanism comprises an air blowing part and an ejection removal part; the air blowing part comprises an air box and blades; an air inlet and an air outlet are formed in the air box;the blades are arranged inside the air box; the ejection removal part comprises a long straight tube and a short straight tube with same cross sections; and the power mechanism comprises a spiral rod, a motor, a central gear, blade gears and a spiral rod gear. By adopting the technical scheme, stone in crushed straw articles can be effectively removed.