The influences of deformation temperature on microstructure dynamic recrystallization of 7A04-T6 ultra-high strength aluminium alloy by isothermal compression experiments in different deformation temperature on the 6300KN extrusion press. The experimental results show that both tensile strength and elongation increased with deformation temperature increasing. At 480°C, tensile strength reached 582Mpa and elongation increase to 9%. In the experiment, dynamic recrystallization of 7A04 aluminium alloy is mainly grain boundary nucleation and second phase particle nucleation. The grain size of 7A04-T6 aluminium alloy gradually refined with the deformation temperature increasing. Fracture morphology showed that rupture is belong to mixed rupture of intergranular and transgranular. With the deformation temperature increase to 480°C, grain size become small, the dimple in the fracture increase gradually, and existing the second phase particle in the dimple.