Disney said it will randomly select guests to be scanned by metal detectors.
The park is banning people older than 14 years old from wearing costumes, Disney officials said.
Disney is also discontinuing the sale of toy guns, including toy blasters and squirt guns on Disneyland Resort/Walt Disney World property, and are no longer permitting these items to be brought into the theme parks.
Special Section: Central Florida Theme Park Guide
Park officials said there have also been more deputies and security guards on the premises and specially trained dogs have been patrolling key areas.
Many tourists said they agree with the addition.
"For safety reasons, I think it's good. You know, I think we'd feel safer because I don't think we're safe anywhere in the world now, you know? So yeah, I think it's good," said tourist Renato Scorvino.
AMC Movie Theater at Disney Springs, where Thursday night's premiere of the new "Star Wars" movie takes place, will also have one metal detector.
"I think it's whatever keeps everybody safe is what's in the best interest. So, I understand what they're doing and I would agree with it. It's for everybody's well-being," Hunter's Creek Resident Anne Erpelding said.
Sea World said guests should expect bag checks and metal detector checks.
Universal Orlando said its testing metal detector scans of guests and it's already been doing that for Halloween Horror Nights and other special events.
One woman told Channel 9 that her young daughter has been on enough airline flights that metal detectors wouldn't be anything special to her and wouldn't affect their family visits to the parks.
"You're also going to educate your children that it's for our safety. It's for our safety at the end of the day. If there was no security people would be complaining. Too much security, nobody should complain," Irish tourist Donna O'Shea said.
Channel 9 learned that the security plan was reached through a collaboration of law enforcement and the parks.
Orange County Sheriff's Office Chief Deputy Larry Zwieg said there is no specific or credible threat against any of the parks.
"Considering what's going on in the world, that's going be a natural reaction by the parks here locally, and we work very closely with the Orlando Police Department and also central Florida law enforcement and with all the theme parks. There is heightened awareness but there is no specific threat," Zwieg said.
Channel 9 sent a crew to Disney World and found that the use of the metal detectors didn't appear to slow entry into the park.
A man was arrested by deputies who said he tried to bring a gun inside the Magic Kingdom last weekend.
Disneyland in California will also get metal detectors.