In this work, two (La,Sr)(Al,Ta) O3 single crystals were grown by the conventional Czochralski pulling method by using different rotation rates and pull rates to find out the optimal growth conditions. The total length of the first (La,Sr)(Al,Ta) O3 crystal is about 8.5cm, and the shape is not symmetrical. The small thermal conductivity of the crystal would lead to small temperature gradient, so the growth rate was slow. The shape of the second crystal was improved by adjusting the thermal field. But, the bottom of the residual has blue color. The blue residual was analysed by x-ray and Inductively Coupled Plasma Mass Spectrometry (ICP-MS). Besides, the crystal structure was analyzed and the second phase had been found in crystals by high angle x-ray spectrum and polarizer microscope.