Fit for feeding materiasl in founding workshop, such as new sand, moulding sand and used sand. Improper for large blocks, impure blocks mixed with iron and materials with high milling performance. This machine has great feeding ability, easy to be regulated, can be fed with fixed quantity under control of time delay relay; it is divided into one-way feeding and bidirectional feeding in terms of feeding direction, suspending type and seating type in terms of installation; in order to assure precision of feeding, roller encapsulation is equipped to increase frictional coefficient between adhesive belt and rollers; the rectangle discharging mouth has large dimension which can prevent humping up materials; this machine has close structure, reliable application and can be easily repaired because it has many similar parts with belt type conveyor.