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The increasing need for efficient materials capable of solar fuel generation is primary to the development of a green energy economy. In this contribution, we demonstrate that La-Cr co-doped SrTiO 3 (STO) nano-particles obtained through a one-pot microwave-assisted method exhibit well visible light absorption. We finetune the content of the cation substitution in the structure of STO to develop high-efficiency visible-light-driven water splitting photocatalysts considering the discrete of the impurity levels created by dopants. In our study, drawing conclusion from experiment that photocatalytic hydrogen production performance was optimum when doping mol amount of La-Cr was 5%. The rational expression for high-performance photocatalysts of La-Cr co-doped STO materials are described.