The invention belongs to the technical field of breaking hammers and particularly relates to a breaking hammer with switchable drill rod heads. The breaking hammer comprises a striking part, a jacket, drill rod sliding holes, a drill rod switching mechanism, a pointed drill rod, a pointless drill rod, drill rod tooth surfaces, drill rod springs, a first circular arc-shaped sliding block, a second circular arc-shaped sliding block, a cylindrical gear, a handle, a handle clamping groove, a driving rod and a driving key. The striking part adopts a conventional technique. The drill rod heads are switched through the following steps: the handle is pulled to separate a handle clamping plate from the handle clamping groove in the first circular arc-shaped sliding block, the handle is rotated, power is transmitted to the drill rod heads via the handle, the driving rod, the driving key, the cylindrical gear and the drill rod tooth surfaces, the drill rod tooth surfaces in grooves on the inner sides of the drill rods are engaged with the cylindrical gear to do linear motion in opposite directions relative to the jacket, and when rotated to make the two drill rods have a certain height difference, the handle is clamped in the first arc-shaped sliding block to lock the drill rod switching mechanism, so that switching of the drill rod heads is finished.