He died in 219 and was succeeded by his son, Cao Kang (曹抗).
[2] In 220, Cao Jun's half-brother Cao Pi became the first emperor of the Cao Wei state after usurping the throne from Emperor Xian, the last emperor of the Han dynasty.
The following year, he honoured Cao Jun with the posthumous title "Duke An of Fan" (樊安公).
He was succeeded by his son, Cao Chen (曹諶), as the Duke of Tunliu.
Throughout the reigns of the subsequent Wei emperors, the number of taxable households in Cao Chen's dukedom increased until it reached 1,900.