Haji Mammadov was born on April 28, 1920, in Shamakhi.

He studied at Azerbaijan State Medical Institute in 1943–1948.

In 1930–1948 he worked in Azerbaijan State Orchestra of Folk Instruments, from 1949 he was a soloist of Azerbaijan State Philharmonic Hall.

[1] Haji Mammadov was one of the first performers of works of classical Russian and Western European composers on tar.

He accompanied singers such as Bulbul, Seyid Shushinski, Zulfu Adigozalov, and toured in many foreign countries including Belgium, Poland, Hungary, Iran, Syria and Algeria.