Born in Batum, then part of the Russian Empire, of a Muslim Georgian noble family of the beys of Adjara, Abashidze studied at a local Georgian school and then at a college in Ottoman Turkey.

In 1913 he began teaching at schools in Adjara and published in the local press, championing the pro-Georgian orientation among the Muslim Adjarains.

Between 1918 and 1920, together with Mehmed Abashidze, he was a driving force behind the Liberation Committee of Muslim Georgia, an organization that was active during the Turkish and then British occupation of Batum, advocating incorporation of the region into a newly independent Georgia.

After the Soviet takeover of Georgia, he withdrew from politics and died in Tbilisi in 1966.

[1] Several authors, dealing with the World War I-era Caucasian affairs, confuse Haidar Abashidze with Prince Kita Abashidze, a Georgian Social Federalist and member of the Ozakom.