Foreign matter detection device and method based on coal belt conveying process

The invention discloses a foreign matter detection device and method based on a coal belt conveying process, and relates to the technical field of coal foreign matter detection. The feeding device comprises a supporting bottom frame, and a feeding mechanism is rotationally mounted at the upper end of the inner side of the supporting bottom frame; through cooperative use of the feeding mechanism and the foreign matter detector, coal can be stably conveyed, stone doped in the coal can be effectively detected, under the coordination action of the transferring mechanism and the removing mechanism, the coal doped with the stone can be accurately removed, and the coal doped with the stone can be conveniently transferred into the screening mechanism; by arranging the screening mechanism, the screening frame body can be driven to move up and down in a circulating and reciprocating manner, so that the screening frame body can generate vibration, the removed coal can be conveniently screened, and the screening efficien