The invention relates to an annular groove parallel heat exchanger. A corrugated pipe is sleeved with a housing to form an interlayer as a heat exchange liquid cavity; a liquid inlet and a liquid outlet are formed in the housing; at least two liquid collection partitions are mounted in the interlayer formed by the corrugated pipe and the housing in a clamping manner; and an inner cavity of the corrugated pipe serves as a heat exchange cavity of a heat medium in the heat exchanger. Corrugated concave-convex groove crests of the corrugated pipe and the liquid collection partitions are tightly sleeved to form a plurality of parallel circular grooves; and the liquid collection partitions allow a distance to exist between the corrugated pipe and the housing to form a liquid collection cavity. Directions of the liquid inlet and the liquid outlet are just opposite to directions of an air inlet and an air outlet, so that the heat exchange efficiency is improved. The exchanger is simple and reasonable in structure, simple to manufacture, high in heat exchange efficiency, uniform in heat exchange small and compact in size and good in vibration resistance and is a true efficient heat exchanger.