The utility model discloses a coal fired boiler's coal as fired sampling device, the control unit including the control sampling, a plurality of coal plough that correspond with each boiler coal feedpoint, each coal plough is connected with the the control unit electricity, the coal as fired sampling device still includes sampling head and collector, be equipped with the collecting vessel group that corresponds with boiler quantity in the collector, the control unit is according to the rotatory collector of the coal plough's that different boilers are corresponding signal, in sample collection to the corresponding collecting vessel group with the sampling head collection, it counts the unit still to be equipped with induction meter on the collector, induction meter counts the unit and isconnected with the the control unit electricity, collecting vessel with discernment and boiler correspond is organized. The utility model discloses an increase induction meter counts the unit and hasrealized the discernment to the collecting vessel, can sample alone to each boiler, carries out laboratory analysis alone, realizes accurate blending and rationally mix joining in marriage, reduces the equipment loss, reduces the coal consumption.