The utility model discloses a split heads for double breast reinforcing bar, including a plurality of type of falling U landing legs that are parallel to each other, still include and the first sharp spacer rod that connects gradually of the summit of the type of falling U landing leg respectively to and the second straight line spacer rod that connects gradually of the outside point of the type of falling U landing leg respectively and respectively, outside point is 2 centimetres apart from the bottom of the type of falling U landing leg. The double roof beam of breast need effectively be supported, is on a parallel with the roof beam cross -section with the split heads and puts, through the row's of going up muscle of muscle at the bottom of the first sharp spacer rod supporting beam, through lower row of muscle of muscle at the bottom of the second straight line spacer rod supporting beam. First sharp spacer rod, second straight line spacer rod and a plurality of type of falling U landing leg make the supported effects of breast muscle relatively stable simultaneously. The device simple structure, processing is convenient, more importantly, the support of multilayer steel muscle and breast multirow reinforcing bar can be realized to single split heads. Simultaneously, this split heads has been avoided processing dropping of extra mortar heel block and mortar heel block, has improved the stability that double breast muscle supported.