There he studied under Boris Fogel, Semion Abugov, Genrikh Pavlovsky. In 1939, Lev Orekhov graduated from the Leningrad Institute of Painting, Sculpture and Architecture in Alexander Osmerkin workshop.
He was regarded as one of representatives of the Leningrad school of painting. In 1932, Orekhov entered at the first course of the painting department of the Leningrad Institute of Painting, Sculpture and Architecture. His graduation work was a genre painting named "A Rest of collective farmers in haymaking time during the lunch break".
Since 1939 Lev Orekhov has participated in Art Exhibitions.
He painted portraits, landscapes, still-life, genre scenes, and sketches from the life. In 1950s he was most famous for his Crimea etudes done from nature, later for summer landscapes and genre scenes from the Russian countryside life.
In the 1950s Lev Orekhov painted plein air, with special attention to lighting and tonal relationships. He painted with an accented stroke.
In the 1960s his style morphed towards more decorative and graphic quality of painting.
His drawing and composition become more abstract. He died on November 6, 1992 in Saint St. Petersburg. His paintings reside in Art museums and private collections in Russia, France, England, in the United States., Italy, and other countries.
Union of the Soviet Socialist Republics Union of Artists]
Since 1946, Lev Orekhov was a member of the Leningrad Union of Soviet Artists.