The council documents show how low-paid servers have been splashed with oil from deep-fat fryers and injured by cooking equipment and hot water.
Two years ago, a video by employees claimed the phenomenon of “McBurns” on the hands and arms of staff made them instantly recognisable.
And one staff member said: “I’ve worked at McDonald’s for five years. After being burnt by an apple pie, I was told to put ice on it. Burns happen all the time.”
A number of staff were so badly burned last year they needed a week off work.
And a teenager working in a restaurant was splashed with hot water when another employee slipped.
Councils in England disclosed details of seven incidents so serious that the Health and Safety Executive had to be informed.
But the tally of incidents could be higher as McDonald’s only needs to inform the authorities if an employee needs a week off.
Less serious accidents can be dealt with in-house.
“McDonald’s make billions every year yet still fail to invest adequately in workers’ safety.”
A McDonald’s spokesman said: “Health and safety is of paramount importance to us and we place great emphasis on our employees’ wellbeing.
“The kitchens are busy working environments, so we have robust training and rigorous safety processes. We regularly review and update procedures where necessary.”