Building stones crushing and screening system

The utility model discloses a building stones crushing and screening system, including backstroke crusher, pipeline, vibration screening device, charging line and the feed bin that connects gradually, still including letter sorting platform and circulating line, the de -ironing separator is installed to the setting of letter sorting platform on the letter sorting platform between backstroke crusher and pipeline, the vibration screening device is provided with a plurality of screenings and exports, and the screening export sets up the screen cloth of different specifications, and the aperture of screen cloth is extremely little by greatly from upper end to lower extreme, and upper end screen export passes through circulating line and backstroke crusher entry intercommunication, and all the other screen export pass through the charging line and the feed bin communicates. The utility model discloses effectively get rid of impurity, realized the make full use of of building stones, reduced fragmentation process's