143_下06 fully mechanized working face crossing NF₆ fault in Dongtan Mine was taken as example, based on fault occurrence and fall condition, when advancing from fault foot wall to hanging wall, cutting horizon was controlled by advanced brake knife cut bottom, which could pull advanced support to maintain roof when crossing fault, metal mesh combined with upper plate beam in broken roof area was used to support roof, with favorable crossing NF₆ fault, which provided advantages for working face advancing and efficiency.