Lee Ka Yiu joined Sham Shui Po youth team when he was young.

Lee helped the club to gain promote from Second Division by scoring 4 goals in 16 games in the 2010–11 season.

He was revealed as a Tai Po player during the club's season kick off event on 19 July 2016.

[1] On 17 July 2019, Eastern announced Lee's signing at their season opening media event.

[3] On 15 August 2012, Lee made his international debut for Hong Kong in a friendly match against Singapore.