Ferromagnetic (FM) semimetals FenGeTe2(n=3, 4, 5), exhibit several symmetry-protected bandcrossing points or lines near the Fermi energy (EF ) and these topological properties of energy bands lead to interesting transport properties. We study these materials employing the first-principle calculations and the tight-binding Hamiltonian constructed by fitting the parameters of the first principles calculation. In the presence of spin-orbit coupling (SOC) for n=3,5 a large Berry curvature (BC) concentrated on the nodal lines is observed. The consequence of the correlation of the topological nodal line and magnetic moments on anomalous Hall conductivity (AHC) σxy and anomalous Nernst conductivity (ANC) αxy have been investigated. We find σxy = 150 S/cm for n=3, 295 S/cm for n=4, and 90 S/cm for n=5 at 0 K, while the ANC is observed as αxy = 0.55 A/Km for n=3, 0.10 A/Km for n=5, and 0.80 A/Km for n=4, at the EF at room temperature. Our calculated AHC values at 0 K, i.e., 150 S/cm for Fe3GeTe2 and 90 S/cm Fe5GeTe2, are consistent with the experimentally reported values. Also the experimentally reported value of ANC for Fe5GeTe2 is close to our calculated value at room temperature, i.e., 0.10 A/Km.