He graduated from the Voronezh gymnasium (1902). Studied violin playing with G.E. Fuchs, then singing at R. Nouvel-Nordi (St. Petersburg). Trained in Paris.
Alexander Lvovich Kachenovsky performed on stage in Opera Comic (Paris, 1908-1909), in the St. Petersburg National House (1909, 1911-1916), Theater of Musical Drama (since 1916), in Kiev and Odessa (1920s).
In the 1930s was an artist of the Leningrad Opera Theaters. The 1st performer of the parties of Razin ("Stenka Razin and the Persian Princess" Nikolai Yakovlevich Afanasyev), Grigory Suslov ("For the Hammer and Sickle"), Dodon ("The Golden Cockerel" by Nikolai Andreyevich Rimsky-Korsakov). Among the best games of Kachenovsky is Susanin ("Life for the Tsar" by Mikhail Ivanovich Glinka), Melnik ("Rusalka" by Alexander Sergeevich Dargomyzhsky).
He performed in chamber concerts, including in the city of Voronezh (June 1912). The composer S. Kashevarov dedicated the Last Leaves romance to Kachenovsky.