This research aims to investigate the effects of dietary konjac glucomannan and κ-carrageenan (SF) on sow performance and suckling piglet gut barrier. Thirty-four sows in late gestation (parity 2–5) were selected at random and grouped into two treatments. The control group (Con group; n = 17) was fed the basal diet; the SF group was fed the same diet supplemented with 0.25% konjac glucomannan + 0.25% κ-carrageenan (SF group; n = 17). The results showed that sows fed the SF diet had a higher feed intake during lactation than the Con group (P