Abstract: Two kinds of polyester fibers with different properties were laid into web and hydroentangled respectively. The influence of fiber property on hydroentangling process and fiber entanglement was researched. The rule and action on entanglement of fibers with different properties by spraying with high speed jets of water were analyzed. The result showed that the effect of entanglement increased with increasing water-jet pressure and decreasing speed of support belt; when fibers have the same length and fineness, the fiber which has smaller bending rigidity and better hydroscopicity and bigger frictional coefficient can entangle better under the same jet spraying force and time; The hydrophilic property of spunlaced fabric is related to fiber entanglement degree and fiber hydroscopicity