Abstract: The directionally solidified （DS） superalloy DZ-22 possesses rather high mechanical properties at both intermediate and high temperatures, for instance, its stress-rupture strength for 100h at 760℃ and 1040℃ are 804MPaand 139MPa, respectively. Its properties are comparable with the well-known DS superalloy PWA1422. Therefore, it is applicable to advanced aircraft engine blades. The chemical composition of DZ-22 is based on the composition of PWA1422, but the content ranges of Hafnium and Carbon have been readjusted according to experimental results, so its Hafnium content is limited in 1.2-2.0 wt.% instead of 1.5-2.5 wt. % and its Carbon content is 0.12-0.16wt. % rather than 0.08-0.14 wt.%>. In addition, no Zirconium is added intentionally in the alloy. The test results show that the shell-mould with drawn rate during the DS process affects obviously on the orientation of columnar crystals. The suitable drawn rate has been established about 7 mm/min in the equipment of the present work. Enhancement of solution temperature during heat treatment can improve stress-rupture life at both 980℃ and 1040℃, while the elongation decreases slightly. A pretreatment at 1150℃ prior to the solution treatment can raise the incipient melting temperature.