Weighing system for accurate weighing and measuring of fine materials, the weighing system comprises a main material weighing unit, and a linear compensation apparatus having a weight loading mechanism, the weight loading mechanism comprising a bearing plate; a drive apparatus, mounted onto the bearing plate; and a measuring weight, connected to the drive apparatus and hoisted or lowered by the drive apparatus to apply loads to or reduce loads from the bearing plate, and having a supporting plate, whererin the bearing plate and the supporting plate are arranged opposite each other from up to down, with a loading area formed therebetween; wherein the drive apparatus further comprises a hoisting drive mechanism and a hoisting rod; and wherein the measuring weight is connected to a drive rod of the hoisting drive mechanism by means of the hoisting rod; wherein the hoisting drive mechanism is vertically mounted on the lower end face of the bearing plate, and the measuring weight is on the supporting plate, or the hoisting drive mechanism is vertically mounted on the upper end face of the supporting plate, and the measuring weight is above the hoisting drive mechanism; wherein one end of the bearing plate is connected to a weighing top plate of the main material weighing unit, and one end of the supporting plate is connected to a bottom of the main material weighing unit, characterized in that, a through hole is disposed in the middle of the measuring weight, the hoisting rod passes through the through hole to connect to the drive rod of the drive apparatus, the lower end of the hoisting rod has a conical surface, a countersink is further disposed in the middle of the measuring weight, the through hole is above the countersink and communicates with the countersink, and the conical surface of the hoisting rod is positioned in the countersink. a main material weighing unit, and a linear compensation apparatus having a weight loading mechanism, the weight loading mechanism comprising a bearing plate; a drive apparatus, mounted onto the bearing plate; and a measuring weight, connected to the drive apparatus and hoisted or lowered by the drive apparatus to apply loads to or reduce loads from the bearing plate, and having a supporting plate, whererin the bearing plate and the supporting plate are arranged opposite each other from up to down, with a loading area formed therebetween; a weight loading mechanism, the weight loading mechanism comprising a bearing plate; a drive apparatus, mounted onto the bearing plate; and a measuring weight, connected to the drive apparatus and hoisted or lowered by the drive apparatus to apply loads to or reduce loads from the bearing plate, and having a bearing plate; a drive apparatus, mounted onto the bearing plate; and a measuring weight, connected to the drive apparatus and hoisted or lowered by the drive apparatus to apply loads to or reduce loads from the bearing plate, and having a supporting plate, whererin the bearing plate and the supporting plate are arranged opposite each other from up to down, with a loading area formed therebetween; wherein the drive apparatus further comprises a hoisting drive mechanism and a hoisting rod; and wherein the measuring weight is connected to a drive rod of the hoisting drive mechanism by means of the hoisting rod; wherein the hoisting drive mechanism is vertically mounted on the lower end face of the bearing plate, and the measuring weight is on the supporting plate, or the hoisting drive mechanism is vertically mounted on the upper end face of the supporting plate, and the measuring weight is above the hoisting drive mechanism; the hoisting drive mechanism is vertically mounted on the lower end face of the bearing plate, and the measuring weight is on the supporting plate, or the hoisting drive mechanism is vertically mounted on the upper end face of the supporting plate, and the measuring weight is above the hoisting drive mechanism; wherein one end of the bearing plate is connected to a weighing top plate of the main material weighing unit, and one end of the supporting plate is connected to a bottom of the main material weighing unit, characterized in that, a through hole is disposed in the middle of the measuring weight, the hoisting rod passes through the through hole to connect to the drive rod of the drive apparatus, the lower end of the hoisting rod has a conical surface, a countersink is further disposed in the middle of the measuring weight, the through hole is above the countersink and communicates with the countersink, and the conical surface of the hoisting rod is positioned in the countersink.