Wong was among around 30 protesters who had staged a three-hour sit-in at a harbourfront statue and were led away into police vans.
Xi's visit this week marks 20 years since Hong Kong was handed back to China by Britain and comes at a time when fears are growing that Beijing is tightening its grip on the semi- autonomous city.
Protesters had encircled the sculpture of a golden bauhinia flower which became the emblem of Hong Kong in 1997.
Some activists chained themselves to the sculpture while others climbed into its petals.
Police cleared the area and surrounded the statue, leading away protesters one by one.
Most walked but Wong and young legislator Nathan Law lay down and were carried away from the scene.
Before the arrests began, protesters shouted: "Civil disobedience, no fear!" and "Xi Jinping, can you hear us?"
Police had warned them that they were causing a public nuisance and would be arrested if they did not move.
As Wong was carried away to the awaiting vans, he shouted: "Protest on July 1!" -- the anniversary of the handover.
The final protesters to be removed were inside the golden flower and helped down by firefighters.
Xi is due to land in Hong Kong tomorrow for a three-day visit to attend anniversary celebrations and swear in the city's new leader Carrie Lam.
Hong Kong is ruled under a "one country, two systems" deal, enshrined in the handover agreement, which allows it rights unseen on the mainland, including freedom of speech and an independent judiciary.
Protesters at the bauhinia statue chanted "Long live the Umbrella Movement!" and "I'm a Hong Konger!"
The Umbrella Movement was the name given to mass rallies in 2014 calling for democratic reforms. Wong and Law were among the student leaders of those protests, which ultimately failed to win concessions.
Frustration over the lack of progress has prompted campaigners like Wong and Law to call for self-determination -- other activists are demanding a complete split from China.
Protesters at the statue also called for the release of Chinese dissident Liu Xiaobo who was granted medical parole this week due to late-stage liver cancer but remains in the mainland.
The bauhinia statue stands outside the convention centre where Xi will attend anniversary events and is a stone's throw from the hotel he will stay in.
The spot is popular with mainland visitors.
Some of the demonstrators, including Wong, had already draped the statue with a black flag on Monday during an early morning anti-China protest. It was removed by police.
Disclaimer: No Business Standard Journalist was involved in creation of this content
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