Studying the light tensor mesons properties can be useful for understanding the QCD in low energy. In this work, an attempt was made to consider masses and decay constants of the light tensor mesons via the QCD sum rules (SR). The SR has been successfully applied to a wide variety of problems in hadron physics. In this method, calculation is started with correlation function investigated in two phenomenological and theoretical sides. Computing the theoretical part of the correlation function via the operator product expansion (OPE) consists of two perturbative and non-perturbative parts. In perturbative part, quark currents can be replaced by Feynman’s free propagator with a good approximate. In non-perturbative part contribution of quark-quark condensate as well as quark-gluon condensate are considered. Equating two sides of correlation function, the phenomenological and theoretical, and applying the Borel transformation to suppress the contribution of the higher states and continuum, the physical quantities are estimated.