A novel hydraulic lime was prepared as repairing materials for architectural heritage using air hardetaittg lime, white cement, reactive powders, additives and fiber as the main material. The effect of accelerated carbonation on the mechanical properties and the durability of hydraulic lime mortar were investigated. The modulus of elasticity and the mass loss were the main evaluation indicators in univariate (freeze thaw cycle, sulfate) and multivariate coupling(dry wet cycle and sulfate) conditions. Results show that strength of hydraulic lime mortar after 3d of accelerated carbonation is 75 times that under the natural curing conditions. The frost resistance of hydraulic lime mortars is significantly improved by adding 01%(by mass) polypropylene fibers and no visual damage occurred to the mortar after 116 freeze thaw cycles. Additionally, the resistance to sulfate attack of hydraulic lime mortar is also greatly improved by adding 1%(by mass) aluminum additives.