More than 1000 people have rallied in Sydney's streets in support of pro-democracy protests in Hong Kong.

Many people wore face coverings to disguise themselves on Sunday as they gathered in the CBD and marched through the streets yelling "fight for freedom" and "stand with Hong Kong".

Hong Kong pro-democracy advocates take to Sydney's streets on Sunday. Credit:AAP

They carried umbrellas, flags and signs calling for democracy, human rights and an end to "tyranny".

"To the Chinese government and the Hong Kong government, I will use a quote from Winston Churchill from World War II: that we shall never surrender," one protester told the crowd.