Cellphone video captured in Mississippi shows a driver being choked and wrestled to the ground by state troopers after being pulled over and “detained” for speeding.

“Get your f—king hands behind your back,” a cop can be heard telling Robert Morton, 34, right before grabbing him by his neck and body-slamming him.

“You ain’t got to do all that!” shouted Morton’s pregnant fiancé, Porsha Shields, who caught the tussle on video. “You’re supposed to be out here protecting us!”

Morton had been pulled over by a Highway Patrol officer for going 101 mph in a 65 mph zone somewhere in Clay County when the incident went down.

Video posted on Facebook by friends of Shields shows him speaking with the state trooper on the side of the road — with the cop holding him up against his car.

“Why you got me like this,” Morton asks.

“I pulled you over at 101,” the trooper replies.

“When you walked over to the car I asked you what was the reason you pulled me over,” Morton says. “You said, ‘When I get your license and registration I’ll tell you.’ ”

The trooper tells Morton, “That is correct.”

“And then you said, ‘Get out the car.’ I get out the car, I’m calm,” Morton explains.

The trooper promptly tells him, “Then you show me your hands right now.”

Still facing forward, Morton shows him his hands but refuses to let the cop put him in handcuffs.

“You’re being detained,” the trooper says.

“For what? Detained for what?” Morton can be heard asking. “Why am I being arrested.”

The trooper tries to grab hold of Morton, but he squirms and breaks free from his grip — prompting the cop to draw his taser. That’s when a second trooper shows up, and proceeds to choke Morton and slam him.

The first cop who originally stopped Morton also helps take him to the ground.

“Oh my goodness!” Shields shouts on video. “You ain’t gotta do all that!”

Morton got hit with multiple charges for the incident, according to jail records — including disorderly conduct, resisting arrest and malicious mischief. Highway Patrol officials could not be reached for comment Wednesday.