Crown Prince Sheikh Mohammed bin Zayed said he was "delighted" to welcome Xi, posting photos on Twitter of the Chinese president receiving flowers on landing in the emirate.
"This is a historic visit and represents a new stage of cooperation in all fields, which will bring growth, development and prosperity to the people of our nations," said the crown prince of the UAE capital.
Abu Dhabi is the first stop on Xi s tour, which also includes Senegal, Rwanda and South Africa.
The Chinese president s arrival followed the Gulf state earlier on Thursday publishing details of new deals clinched with Beijing.
State-owned Abu Dhabi National Oil Co. said it had awarded two contracts worth $1.6 billion (1.4 billion euros) to BGP Inc., a subsidiary of China National Petroleum Co., for a seismic survey in the emirate.
The survey is to search for oil and gas in onshore and offshore sites covering an area of 53,000 square kilometres (20,463 square miles), the statement said.
State-run CNPC already has two concession rights contracts with ADNOC worth around $3 billion.
The UAE s state-owned DP World also announced an agreement by the two countries to build a new trade zone in Dubai.
The deal between the global port operator and the Zhejiang China Commodities City Group will see a "traders market" built at Dubai s Jebel Ali free zone.
The project is part of China s trillion-dollar "One Belt, One Road" infrastructure initiative, an ambitious plan to revive the ancient Silk Road trading routes with a global network of ports, roads and railways.
The new facility will cover three square kilometres at the Jebel Ali site, which is the Middle East s largest trade zone, DP World said in a statement.
The market will host a vast range of goods from food and cosmetics to building materials and technology.
DP World, which operates in 40 countries, did not announce the value of the deal or provide a timeframe for its construction.
China is the United Arab Emirates top trading partner, with non-oil trade in 2017 rising 15 percent year-on-year to over $53.3 billion -- more than 90 percent of it Chinese exports to the UAE , according to Abu Dhabi s finance ministry.
In a further sign of strengthening ties between the two countries, Dubai-based real estate developer Emaar Properties on Wednesday announced plans to build the Middle East s largest Chinatown in the UAE . - APP/AFP