While studying in Bulgaria and Geneva he encountered socialist ideas, and in 1897 he joined the Bulgarian Workers' Social Democratic Party (BWSDP).
[1] After the failed September uprising of 1923, Kabakchiev was arrested and condemned to twelve and a half years' imprisonment.
By 1928, however, Kabakchiev had been removed from the BCP's Central Committee, and he was not re-elected to the ICC at the Sixth World Congress of the Communist International held in that year.
Instead, he started teaching at the International Lenin School and worked as a researcher at the Marx–Engels–Lenin Institute in Moscow; he also joined the All-Union Communist Party (Bolsheviks).
[2] The urn with the ashes of Khristo Kabakchiev was buried at the New Donskoye Cemetery in Moscow until the 1980s.