TPP，the New Zealand’s biggest free trade agreement，will develop a market of more than 800 million customers and 36% of world GDP for New Zealand exporters. Estimated NZ$27 million of tariffs would be eliminated on New Zealand products and Estimated NZ$2.7 billion is added to New Zealand’s GDP（in 2007 dollars）by 2030 etc. However，New Zealanders have some concerns on TPP，mainly reflected in low benefits of critical dairy products，drug prices rise caused by the intellectual property rules，investors-state dispute settlement mechanism（ISDS）influence national sovereignty and regulatory capabilities. Nevertheless，considering New Zealand’s national conditions as well as the results of becoming or not becoming a party of TPP，New Zealand is likely to approve TPP smoothly before 2017 election.