The invention relates to an Archimedean-double-helix flow split nipple. The Archimedean-double-helix flow split nipple comprises an Archimedean-double-helix flow split nipple body which is a tubular column, wherein Archimedean double helixes are processed in an inner cavity of the tubular column, a double-helix flow channel formed by the Archimedean double helixes and the inner cavity of the tubular column is a groove in a trapezoid three-dimensional shape, and screw threads are arranged at both the upper part and the lower part of the Archimedean-double-helix flow split nipple body. By adopting an Archimedean-double-helix structure to change the flow state and the flow direction of sand-carried fluid in tubular columns in front of single-stage or double-cluster hydraulic ejectors, the sand-carried fluid is enabled to flow into inner cavities of the hydraulic ejectors in a rotational-flow state, the problem of the balance among the particle sand concentration, the flow and the pressure between nozzles of the single-stage or double-cluster hydraulic ejectors is solved, the practicality is high, the application effect is apparent, and the flow split nipple is applicable to multi-stage hydraulic ejection and fracturing tubular columns in vertical wells and horizontal wells.