Since 1972, Claude Beausoleil has published 58 books, including Intrusion ralenti, Avatars du trait, Le Dormeur, Fureur de Mexico, La vie singulière, Le Rythme des lieux and Rue du jour. He published his first novel, Fort Sauvage, in 1994 and has also edited numerous anthologies, including La poésie canadienne and La poésie mexicaine. Beausoleil teaches at Montreal's Collège Édouard-Montpetit.
From 1978 to 1985 Beausoleil was the poetry critic for Le Devoir in Montreal. He has collaborated on many literary magazines both in Québec and internationally, including Estuaire, Nuit blanche, Jungle and Europe. He is the director of the poetry magazine Lèvres urbaines which began in 1983.
In the course of his career, Beausoleil has won many prizes, including the Nelligan poetry prize, the Grand prix de poésie du Journal de Montréal, the prix Estuaire des Terrases Saint-Sulpice and the Georges-Limbour prize in France. He received the Ordre des Francophones d'Amerique in 1989.