Two men have been arrested after an assault and robbery in Sydney's west last week, which left a woman in hospital with facial injuries.

Mikato Pearce, 50, was walking to Kingswood train station on her way to work at 5.15am on Wednesday when she was approached by two men.

Mikato Pearce had to go to hospital for significant facial injuries after she was robbed on Wednesday night.

CCTV shows one punching her and causing her to fall to the ground. The men then take her backpack, which held her phone and wallet.

Ms Pearce was treated at Nepean Hospital for facial injuries before being released.