The utility model discloses a continuous type rotary roasting furnace which comprises a furnace body (1) and a barrel body (2) arranged inside the furnace body (1). The barrel body (2) comprises a feeding end (24), a middle barrel body (20) and a discharge end (25) in sequence. The continuous type rotary roasting furnace is characterized by further comprising a heat insulating component (5). The insulating component (5) is arranged inside the barrel body (2), and a clearance is reserved between the outer wall of the heat insulating component (5) and the inner wall of the barrel body (2). Shoveling plates (3) and weir plates (4) are arranged on the inner wall of the middle barrel body (20). The included angel between the extending direction of each diversion plate (3) and the axial direction of the middle barrel body (20) is an acute angle or an obtuse angle, and two adjacent shoveling plates (3) do not contact with each other. The continuous type rotary roasting furnace can improve the processing effect of the roasting furnace and the roasting quality of a molecular sieve.