The utility model discloses a viscous crude thin oil whirl blender, which comprises a housin, the viscous crude import is seted up to the casing upper end, and the side sets up the thin oil import, and the lower extreme is then seted up the miscella and is exported, the inside swirl generator that sets up of casing. Swirl generator comprises a plurality of commutator segments that evenly weld on shells inner wall with the angle, and the commutator segment evenly arranges around casing central line circumference, forms between the commutator segment by the swirl generator outside fluid passage to the tangential direction of inside. The casing is vertical cylinder, and the thin oil import is seted up in casing middle part tangent line position, make the thin oil come liquid evenly smoothly the whirl get into in the casing to around axle center rotating flow in the annular channel, finally make thin oil evenly distributed on the swirl generator at blender center in the casing and between swirl generator. The utility model discloses it organically combines to be in the same place to rub mixture of viscous crude thin oil and reduction to hinder, has improved and has mixed rare mixed effect, has reduced transport pressure drop and energy consumption.