Abstract: Retard-bonded prestressed concrete which has appeared in recent twenty years is a new and distinctive prestressed system. For the research on mechanical behavior and service property of retard-bonded prestressed concrete members, retard-bonded prestressed strands are made by manual work in this paper. Experimental research and theoretical analysis on short-term stiffness of three retard-bonded partially prestressed concrete T-beams are carried out under static loadings. Based on the experiment research, connected with the characteristic of test beams and the national current standard, the calculation formulas on the short-term stiffness of retard-bonded partially prestressed concrete T-beams are proposed. The results show that the calculated values given by the modified formulas are identical with the test results, which provides theoretical reference for the actual project application of the new retard-bonded prestressed concrete system.