This article reports synthesis of PbTa2O6 photocatalyst by ecofriendly solid state mechanochemical method with green chemistry approach. The synthesized photocatalyst was characterized by various analytical investigative techniques such as UV DRS, FTIR, XRD, SEM with EDAX and TEM with SAED for structural confirmation. Band gap of synthesized PbTa2O6 was found to be 4.38 eV and XRD pattern was confirmed as hexagonal crystal phase. SEM shows agglomerated crystalline particles. The photocatalytic property of synthesized catalyst was examined by photodegradation of Evans blue as a representative dye systematically. The degradation follows first order kinetics with rate constant 4×10-3 min-1.