Mechanical alloying method has been employed to prepare the Ba-Fe-As-P precursors, necessary for the Ba-(As,P) flux growth of the single crystalline BaFe2(As1-xPx)(2). By alloying constituent elementals mechanically, the Ba-(As,P) precursors are successfully formed at the room temperature within one hour, significantly reducing preparation time. Using the mechanically alloyed precursors, we have grown single crystals of BaFe2(As1-xPx)(2) with the sizes up to 5 mm x 5 mm x 0.1 mm. (C) 2016 Elsevier B.V. All rights reserved.