A new method to reduce weft washing shrinkage of higher elastic denim fabric was introduced and compared with traditional process. The current leasure defects or reducing the weft washing shrinkage of the higher elastic denim fabric were generally summarized. Hot air flapping process was prrocess was proposed and compared with the other two process. The results shhowed that weft washing shrinkage of higher elastic denim fabric was reduced to about 10% by taking hot air falpping process and light shaping process. But the elongation at specific force of denim fabric was higher with the treatment of hot air flapping. It is considered that demand for lower washing shrinkage of higher elastic denim fabrics is satisfied by hot air flapping process.