A system for the continuous production of a curved profiled preform from planar semi-finished fibrous products, for the production of a fiber-composite component, said system having - a fiber supply installation which is configured for providing the semi-finished fibrous products; - a forming installation which is configured for forming a first belt portion from a first lateral portion of the semi-finished fibrous product and for forming a second belt portion from a second lateral portion; - a shearing installation which has at least two rotating roller elements (51, 52) that are disposed so as to be mutually spaced apart in a conveying direction and are configured so as to bear in a force-fitting manner on one of the belt portions (3a, 3b) and to interact with the latter in such a manner that shearing of the fibers between the roller elements in order for the curvature of the profiled preform to be formed is caused by a rotational speed differential set between the roller elements; - a cross-sectional modification installation which is different from the shearing installation and which has a first rotating roller element which bears in a force-fitting manner on the first belt portion and has a second rotating roller element which bears in a force-fitting manner on the second belt portion, wherein at least one of the roller elements is disposed so as to be transverse to the conveying direction and interacts with the respective belt portion (3a, 3b) in such a manner that a web height modification of a web portion that is defined between the belt portions (3a, 3b) is caused during the production of the curved profiled preform by a movement of the roller element that is transverse to the conveying direction; and - a controller installation which is adapted for actuating the shearing installation in order for the rotational speed differential to be set and for actuating the cross-sectional modification installation in order for the web height of the web portion to be set. - a fiber supply installation which is configured for providing the semi-finished fibrous products; - a forming installation which is configured for forming a first belt portion from a first lateral portion of the semi-finished fibrous product and for forming a second belt portion from a second lateral portion; - a shearing installation which has at least two rotating roller elements (51, 52) that are disposed so as to be mutually spaced apart in a conveying direction and are configured so as to bear in a force-fitting manner on one of the belt portions (3a, 3b) and to interact with the latter in such a manner that shearing of the fibers between the roller elements in order for the curvature of the profiled preform to be formed is caused by a rotational speed differential set between the roller elements; - a cross-sectional modification installation which is different from the shearing installation and which has a first rotating roller element which bears in a force-fitting manner on the first belt portion and has a second rotating roller element which bears in a force-fitting manner on the second belt portion, wherein at least one of the roller elements is disposed so as to be transverse to the conveying direction and interacts with the respective belt portion (3a, 3b) in such a manner that a web height modification of a web portion that is defined between the belt portions (3a, 3b) is caused during the production of the curved profiled preform by a movement of the roller element that is transverse to the conveying direction; and - a controller installation which is adapted for actuating the shearing installation in order for the rotational speed differential to be set and for actuating the cross-sectional modification installation in order for the web height of the web portion to be set.