The utility model discloses a constructional column embedded steel bar drilling device with a slag and ash receiving device. The constructional column embedded steel bar drilling device comprises a supporting device. A supporting rod, a pressure handheld rod, a connecting rod, a working rod and a bolt are arranged above the supporting device, the supporting rod and the working rod are movably connected into a four-connecting-rod device through the pressure handheld rod, the connecting rod and the bolt, the supporting rod of the four-connecting-rod device is parallel to the working rod, and anelectric drill is installed at the top of the working rod and electrically connected with a motor. And a slag and ash receiving device is movably mounted in the middle of the working rod. Workers do not need to climb up an escalator to conduct high-altitude drilling operation, safety is high, and operation is convenient. The slag and ash receiving device reduces the influence of drilling dust on the health of workers; the drilling device is simple in structure and convenient to operate, can easily drill reinforcement holes in the upper portion of the constructional column, meets the standard requirement of drilling depth, can be constructed by one person in the operation process, greatly reduces labor, and can effectively improve production efficiency.