The invention discloses a steel bar spacing indicator for construction. The steel bar spacing indicator for construction comprises a walking wheel which is capable of being held and pushed by hand and is composed of a pushing rod, a support frame, a wheel ring, wheel spokes and a wheel shaft, and is characterized in that dotting pens are arranged on the wheel ring at intervals, an ink box is arranged on the support frame, and in the rolling process of the wheel ring, the dotting pens on the wheel ring are inked and dot for indication at the same time by contacting an ink-dipping contact of the ink box. Compared with the prior art, the steel bar spacing indicator for the construction has the advantages of being rapid in indication, high in efficiency, and capable of saving manpower and improving construction speed; being accurate in indication, and capable of eliminating artificial errors and improving construction quality; being simple and convenient to operate, capable of relieving labor intensity, and capable of indicating a plane and a steel bar or a faceted surface; being simple in structure and low in cost.