Cai Weilian (Chinese: 蔡威廉; 1904–1939) was a Chinese painter.

Cai Weilian was born and raised in Shaoxing, Zhejiang; of Chinese philosopher Cai Yuanpei's seven children, Weilian was reportedly his favourite.

[1] She studied oil painting in both Belgium and France.

[1] Cai specialised in modernist oil painting and became a professor at the Hangzhou-based National Academy of Art in 1928.

[1] Cai Weilian married fellow artist Lin Wenzheng and relocated to Kunming, Yunnan.