The 2017–18 Telenet UCI Cyclo-cross World Cup was a season long cyclo-cross competition, organised by the Union Cycliste Internationale (UCI). The UCI Cyclo-cross World Cup took place between 17 September 2017 and 28 January 2018, over a total of nine events. The defending champions were Wout van Aert in the men's competition and Sophie de Boer in the women's competition.