The influence of different cooling holes distribution on stress rupture property and fracture behavior of air-cooled turbine blades modeling specimens of single crystal superalloy DD6 at 980℃/300 MPa was analyzed.The results show that cooling holes distribution is the main factor affecting the stress rupture life at the same temperature and stress conditions.The stress rupture life of modeling specimens declines regularly as rows of cooling holes increase,however,the stress rupture life of modeling specimen...