Created many vocal and instrumental works. These are choral and solo songs, the cantata "Seika būk, šalie šalie", "Hymn in honor of Kunigaikštiene Birutė", the opera "Jūratė ir Kastytis" - 1955. (released and recorded in 1970, premiered on April 29, 1972).Harmonized about 500 Lithuanian folk songs, many of which were published in separate notebooks: "Folk Songs for Choir" in 1934-1935, "Folk Songs for Mixed Choir" in 1948. (in Germany), "Folk songs for mixed choir" in 1950. (Chicago), "Folk Songs for Mixed Choir" 1951. (Chicago), "100 Folk Songs" 1951 (Chicago), "Evening Dawn" in 1987. (in Vilnius, compiled by A. Petrauskas), "30 folk songs for a cappella male choir" in 1991. (Kaunas) and "88 folk songs" in 1993. (in Chicago).He composed works for violin, piano, cello and other instruments, wrote articles and reviews. His songs "Lino flower", "After high mountains", "Last party", "Nei vejas pucia", "Up early in the morning" were performed at the US and Canadian Lithuanian song festivals in Chicago and Toronto, his songs are also sung by Lithuanian choirs.in 1996 the book "Kazimires Viktoras Banaitis" by musicologist Ona Narbutienė was published. The composer is also mentioned in the German encyclopedia "Riemann Musik Lexikon".
