The relationship between Malay Champa and Khmer in ancient times was actually very close and interconnected with each other.

After the Khmer king was deposed by Emperor Dhanindra of Sriwijaya, a Khmer prince was brought to Sriwijaya. Although what the Khmer King did then was a rebellion against Srivijaya, his descendants and relatives were not killed.

According to historical records, a Khmer prince was taken to Sriwijaya after the Khmer king was deposed by the Sriwijayan Emperor. The prince was later crowned as King Jayavarman II and founded the Khmer Empire in the early 9th century. The use of Malay as a royal language in the Khmer palace during this time is also noted in historical records, including by the Dutch ambassador Hendrik Hagenaar. Even the manager of the Dutch plant in Cambodia, Jan Galen, only spoke Malay to the Khmer Regent Phamraja.

In recent history when King Norodom's throne was shaken due to his younger brother's rebellion, the Champa Malays sacrificed their lives to put down the rebellion and save King Norodom's throne at that time.

Therefore, some special important posts in the Cambodian government were created for Champa Malays.

On the side of the Kingdom of Champa, according to the tradition of the History of Kelantan, there were some Malays from Patani and Kelantan who were designated as the King of Champa.

When the Champa had to flee the brutality of the Vietnamese, they turned to the Malays and Khmer for protection. Even today, the traditional learning centers in Kelantan remain a choice for Cambodians and Cambodians to deepen their knowledge of Islam.