Ship launching air-bags, invented in China, are also known as inflatable marine airbags, rolling airbags, lifting airbags, and salvage airbags.  They are widely used in launching and landing ships whose launching weight below 100,000ton. 50% small and medium shipyards in Asia and more and more other regions like US, Africa, Russia are using airbag to launch vessels instead of dry dock or mechanical slide way. They have advantages in time saving, labor saving and cost saving.  Airbags are safe, reliable and flexible, as well as environment friendly.