CCTV cameras captured the moments leading up to the attack. (YouTube: CCTV News)
The attack took place at Beijing Badaling Wildlife World on Saturday, the Yanqing district Government said.
Chinese news reports said the incident occurred when one of the women left the vehicle following an argument with another passenger.
CCTV footage of the attack showed a tiger approached the woman only 15 seconds after she left the car.
It then attacked her and dragged her off, prompting the second woman to leave the vehicle in an attempt to help.
The two women were accompanied by a man — who aided the rescue attempt — and a small child, who were uninjured, reports said, adding that the park had been ordered to close for "rectification".
The park allows visitors to drive their own cars, safari style, through an open space where the animals roam free.
Visitors are cautioned not to alight from their vehicles.
China's Xinhua news agency said an investigation had been launched and the zoo temporarily closed.
The video of the attack can be watched at: https://www.youtube.com/watch?v=QLWluiJ3EVI