Abstract: Based on analysis the relationship of visual illusion principles with physical aesthetic feeling, fashion Modeling and structural，this article through specific design cases, apply different visual illusion designs on the women's shoulders ,chest and waist decorative aesthetics for visual correction, Through case analysis method analogy, summed up in a different costume local modeling design approach for witch visual illusion, there are applied length visual illusion in order to compress the shoulder and waist , applied area visual illusion in order to compress the collar or expands the chest and hip, applied distortion visual illusion in order to strengthen the fit women's clothing in "S" shape modeling characteristics. Reasonable apply the visual illusion in designing the fashion modeling, that can improve aesthetics in clothing and dressing effect, and can largely compensate for the lack of structural design.