The invention belongs to the field of conveying equipment for casting, and particularly discloses a casting powder feeder. The casting powder feeder comprises a trough, a bottom plate, first supporting springs, shock-absorbing spring devices, an armature and an electromagnetic coil matched with the armature. The upper ends of the shock-absorbing spring devices are installed on the bottom plate. The feeder further comprises a partition board and second supporting springs. The bottom plate and the partition board are connected through the second supporting springs. The electromagnetic coil is fixed to the bottom plate. The armature is fixed to the partition board. The electromagnetic coil is opposite to the armature. The partition board and the trough are connected through the first supporting springs. The trough is obliquely arranged. Compared with a traditional casting powder feeder, the partition board and the second supporting springs are additionally arranged, so that all the parts interact on one another, and the vibration isolation effect is greatly improved.