The invention discloses an OCr17 continuous casting blank and a production method thereof. The continuous casting blank comprises the following chemical components in percentage by mass: 0.04-0.06% of C, 0.25-0.45% of Si, 0.40-0.55% of Mn, 0.035% or less of P, 0.030% or less of S, 16.50-16.75% of Cr, 0.60% or less of Ni, and the balance of Fe and inevitable impurities. The production method comprises the steps of: control of a continuous casting machine crystallizer water flow, a secondary cold water flow and crystallizer electromagnetic stirring parameters, slow cooling of the continuous casting blank and casting blank angle finishing chamfering plane width control. The method enables the surface pass percent of the continuous casting blank of rolled steel to reach above 99%, and guarantees elimination of surface and subsurface cracks of the continuous casting blank; and through angle finishing, the angle rolling broadening deformation is reduced, the angle temperature drop is reduced, the OCr17 wire folding and cracks are eliminated, the wire rod primary inspection pass percent is above 99%, and the acid washing secondary inspection pass percent is above 95%.