The man, who police have not named, was charged with allowing a dog to be dangerously out of control in a public place and causing injury under the Dangerous Dogs Act 1991, the Metropolitan Police said.
He will appear in custody at Thames Magistrates' Court.
The child also suffered injuries to her neck and shoulder when she was mauled by the animal in a park in Chingford, Essex, on Saturday.
Police said the incident happened at about noon at Pole Hill, Woodberry Way, in front of the girl's parents and her younger brother.
She was taken to a hospital in Essex for surgery, where she is said to be in a stable condition.
A dog, described as a "bull terrier-type" with black and white patches, has been seized by police.
A Metropolitan Police spokesman said officers would not be naming the accused man ahead of his court appearance.