The hot compression test was conducted by a Gleeble3500 dynamic hot-simulation testing machine to study the hot deformation behavior of 3003/4004 two-layered aluminum alloy. The test was conducted at various temperatures (300, 350, 400, and 450 ℃) with various strain rate of 0.05s-1, 0.5s-1, 5s-1, 25s-1. The compression curve shows a sharp increases for the effect of work-hardening, then it goes smooth for dynamic recovery and recrystallization happened. According to the experimental results, the peak stress was decreased as the strain rate reduced and the temperature increased. Finally a constitution equation describes the relationship of strain rate() ,deformation temperature (T) and flow stress (σ) was achieved.