The 15cm high concrete wall is topped with razor wire, miniature US flags and includes 'Keep Out' signs written in both Spanish and English.
It was created by LA-based street artist Plastic Jesus and was inspired by comments made by the Republican Presidential nominee last year when he outlined plans to build a wall along the US-Mexico border to stop illegal immigrants.
Curious tourists snapped photographs of the Los Angeles structure, while a picture of the unusual artwork posted on the artist's Instagram account received more than 14,000 likes by Thursday morning.
One person called the wall "the most genius vandalism of the star yet," while another said it was the "best thing I've seen all day."
There were also those who were unimpressed by the Trump-attacking artwork, with one user exclaiming that "A Trump presidency is what the US needs."
In an interview with the BBC, Plastic Jesus explained why he had built the 'wall':
"I wanted to create a piece that drew attention to [Trump's] potential policies," he says. "I knew this week was the republican convention and I suppose I was capitalising on the momentum of the convention."
And so, on Tuesday afternoon he took his tiny wall made from wood and concrete, and placed it on top of Donald Trump's star on the Hollywood Walk of Fame.
He says the response to his wall has been largely supportive. "I went to Hollywood Boulevard yesterday to take photographs and found myself in an absolute bottleneck of people taking photographs of the piece - it's been absolutely crazy."
The artist, who emigrated to the US from the UK nine years ago, says he's not a fan of Donald Trump, "In the US you'll interact with immigrants from all over the world and it's one of the things that makes the US so great. Donald Trump's policy proposals are a threat to all of the immigrants."
Donald Trump received the 2,327th star on the Hollywood Walk of Fame in 2007 for his work on America's The Apprentice.
By Daniel Avis, BBC's UGC and Social News team

The killing of General Athanase Kararuza and his wife were "shameful acts," he said.
Their daughter was also wounded in the attack outside her school in the capital, Bujumbura.
More than 400 people have been killed in unrest since Mr Nkurunziza announced a year ago his bid for a third term.
He won elections in July, after surviving a coup attempt and mass protests to demand that he steps down.
General Kararuza was the latest in a string of high-ranking army officials who have been targeted by unidentified gunmen.
"He energetically fought against the coup plotters last year and exceptionally contributed in strengthening peace and security during and after elections," Mr Nkurunziza said in a statement.
General Kararuza's bodyguard was also killed in the shooting.
Security forces have also been accused of killing opponents and dumping them in mass graves by rights group Amnesty International.
Shortly after the attack in Bujumbura, the International Criminal Court announced that it was starting a preliminary investigation into the violence in Burundi.
This will decide whether a full-blown investigation will take place, which could result in charges against those accused of being behind the violence.
BBC Great Lakes reporter Robert Misigaro says the killing is a blow for President Nkurunziza because it shows that he cannot guarantee the safety of his officers.
On Sunday, the Minister for Human Rights Martin Nivyabandi survived a grenade attack as he was coming out of church.
Although both opposition and government forces are ethnically mixed, some fear that the violence could descend into a repeat of the genocidal killings which the country has previously experienced.
Mr Nkurunziza is the former leader of a Hutu rebel group which battled a Tutsi-dominated army for many years until he came to power in 2005 as part of a peace deal.
The African Union had said it would send a 5,000-strong peacekeeping force to the country even if the government did not accept it but it has since back-tracked.
Donald Trump's controversial call for a "great, great wall" on the US-Mexico border has yet to be realised but a tiny, tiny one has been built instead - surrounding his star on the Hollywood Walk of Fame.
[NEXT_CONCEPT]
Burundi's President Pierre Nkurunziza has given the security forces a one-week deadline to find the killers of a senior general shot dead on Monday.