He is due to appear in court in the southern Swedish city at 0930 GMT.
The 20-year-old “participated in protests that disrupted traffic” and “refused to obey the police to leave the scene”, according to sources seen by AFP.
He was sentenced to six months in prison, but prosecutor Charlotte Ottosen told AFP that these types of crimes usually result in fines.
The rally, which was organized by the environmental group “Ta sättä främmend” (Back the Future), tried to block the entrance and exit of the port of Malmo to protest against the use of fossil fuels.
“We choose not to stand still, and instead we stop oil pollution. We are restoring the future,” Thunberg said in an Instagram post at the time.
Thunberg became known around the world when she started the “School Strike for the Climate” in front of the Swedish parliament in Stockholm when she was 15 years old.
He and a small group of young people founded the Fridays for Future movement, which became known around the world.
In addition to his climate concerns, the teenager criticizes governments and politicians for not doing well. weather news.
Thunberg simply replied “no comment” to police questions about the Malmo meeting, according to AFP.
Reclaim the Future insists that despite its legal challenges, it remains steadfast in its determination to fight the oil industry.
“If the court decides to consider what we have done as a case it can, but we know that we have the right to live and the oil industry is standing in the way,” the group’s spokeswoman Irma Kjellstrom told AFP.
Six members of the organization will appear in court in Malmo, he said.
“We young people will not wait but we will do what we can to stop this work that is burning our lives,” he said while explaining the group’s plans to continue disobeying the government.