Trunk stability is used to describe how the muscles in the trunk maintain the balance and stability of the spine and the body in general. Wushu competition depends mainly on the trunk area and the surrounding muscles as well as the full control of the muscles and joints working for the motor performance. The author observed the low physical and skill capabilitie of Wushu athletes under 18 years. Therefore, the aim of the study was to test the effect of core Stability Exercise and its Effect on the Physical Abilities and Skill Performance of National Wushu Kung Fu Team. The training program designed for twelve weeks, (4) training units per week, (8) Wushu athletes under 18 years old. The results inicated that the proposed training program using trunk stability exercises had a positive impact on improving the physical abilities. In addition, the proposed training program using trunk stability exercises had an impact on improving the physical and studied skill abilities "Wushu", where the value of Wilkeson (Z) calculated for the physical and skill test "high jump" (-2.57) which means that the differences between the pre- and post-measurements are real and in favor of the post-measurement. The author recommended by keeping core stability exercises as a routine and invent exercises that related to the technical performance of Wushu skills