Police said 37 people were arrested for assaulting officers during the Notting Hill Carnival over the long weekend.
Chairman of the London Assembly Police and Crime Committee Unmesh Desai said the attacks on police were “unacceptable”.
“The high number of attacks on police officers reported throughout the festival is utterly unacceptable and remains a big concern for the committee,” he said.
“Crime of any kind can never be accepted and, with over 350 arrests made this weekend, there's still more work to do to reduce violence at the festival.”
The Metropolitan Police Federation said its members “should not turn up for duty and expect to be assaulted.”
Around a million people attended the two-day festival in west London, which has run for more than 50 years.
At least 30 Met officers suffered minor injuries during the event and a total of 353 people were arrested.
There were 37 arrests for the possession of offensive weapons and 162 for drug-related crimes.
Met spokesman Commander Dave Musker said: “Although I am happy with the smooth running of the festivities, I am, once again, extremely disappointed that a number of people feel that they can assault my officers.
“Officers put themselves on the front line and should under no circumstance be assaulted for protecting the public. We will adopt a zero-tolerance approach to any assault on police officers.”