[en] Preparation of the alkaline earth tungstate films such as Ba_1-xSr_xWO₄ and Ba_1-xCa_xWO₄ on the tungsten substrate was studied with a simple solution process assisted with the ball rotation at room temperature. The solid solution formation and limitations, the effect of oxidizing agent H₂O₂ and alkaline earth ions concentration on the dissolution of W substrate and the growth of Ba_1-xSr_xWO₄ and Ba_1-xCa_xWO₄ films were studied in detail. The ball rotation assistance plays a very important role to enhance the dissolution of the W substrate and mass transport of the reactant species such as alkaline earth ions and WO₄^2- ions onto the solid/solution interface region, where precipitation occurs. Therefore, the rate of film formation was accelerated by the ball rotation assistance to the reaction system. Ba-rich Ba_1-xSr_xWO₄ and Ba_1-xCa_xWO₄ films were formed without high energy or high temperature treatment