Group standing robot online automatic back-burning device and back-burning operation method

The invention relates to a group standing robot online automatic back-burning device, which comprises a conveying roller table mechanism, a plurality of back-burning flame mechanisms, an air source box, a flow separating line, a positioning sensor and an upper computer; the conveying roller table mechanism comprises a conveying roller table and a reduction motor, the conveying roller table is horizontally arranged, and the back-burning flame mechanisms are arranged below the conveying roller table mechanism; each back-burning flame mechanism comprises a base, a linear track and a power assembly are installed on the base, the linear tracks are in the horizontal direction and perpendicular to the conveying direction of the conveying roller table, linear track sliding blocks are installed onthe linear tracks, the power assemblies drive the linear track sliding blocks to move on the linear tracks, sliding plates are installed on the linear track sliding blocks, supporting fixing assemblies are installed on the sl