The invention relates to a method for preparing yttrium titanate transparent ceramic by utilizing coprecipitation-process synthesized powder. The method comprises the following steps: mixing a Y source solution and a Ti source solution to obtain a mixed solution, wherein the mol ratio of Y to Ti in the mixed solution is 1 to 1; dropwise adding the mixed solution into a precipitant solution at thespeed of 3mL/min or below and continuously stirring; ageing and filtering to obtain yttrium titanate precursor sediment; drying the yttrium titanate precursor sediment and calcining at 800 DEG C to 1000 DEG C for 1 to 5 hours, so as to obtain yttrium titanate powder; after grinding the yttrium titanate powder, pressing and molding to obtain a blank; after pre-sintering the blank at 800 to 1200 DEGC for 2 to 5 hours, sintering at 1400 to 1600 DEG C for 4 to 10 hours under a vacuum condition; annealing to obtain the yttrium titanate transparent ceramic. According to the method provided by the invention, the grain diameter of the obtained powder is small and is uniformly distributed; the powder has relatively high sintering activity and is sintered at relatively low temperature to prepare the yttrium titanate transparent ceramic; the method is simple to operate and small in energy consumption.