The invention relates to a cast-in-place concrete column suspended formwork and a concrete column in-place casting method. The column suspended formwork comprises four suspended formwork steel channels and rebar clamping buckles; the four suspended formwork steel channels are sequentially connected in a head-to-tail mode to form a square steel frame, a long strip-shaped groove is formed in the radial direction of each suspended formwork steel channel and located in the side, away from the center of steel frame, of each suspended formwork steel channel, a plurality of first penetrating holes are formed in the upper side wall of each suspended formwork steel channel, a plurality of second penetrating holes are formed in the lower side wall of the each suspended formwork steel channel, every two adjacent suspended formwork steel channels are connected though the corresponding rebar clamping buckles, and the two ends of each rebar clamping buckle extend into the corresponding first penetrating holes in the two corresponding adjacent suspended formwork steel channels correspondingly; and suspended formwork stools are installed at the lower ends of the connection position of every tow suspended formwork steel channels. Compared with the prior art, according to the cast-in-place concrete column suspended formwork and the concrete column in-place casting method, operation is convenient and fast, the application range is wide, recycling, safety and reliability are achieved, and the quality defects of a pitted surface, mortar leakage, rebar off-position and the like of a column foot in a construction site can be effectively controlled.