We construct cosmological models for dark energy based on Lyra’s geometry for the Bianchi-I space-time to understand the evolution of the universe. The specific choice of the deceleration parameter q=-frac{alpha _1}{t^2}+alpha _2-1 is used to determine the exact solutions of the field equations in Lyra geometry. The parameter alpha _1 has a dimension equal to the square of time. Further, we have discussed two cosmological models depending on the parameter alpha _2. Several physical parameters are obtained and the results in both the models are analyzed and presented graphically for the analysis of the results.