Since the discovery of pressure-induced superconductivity in the two-leg ladder system BaFe2X3 (X=S, Se), with the 3d iron electronic density n = 6, the quasi-one-dimensional iron-based ladders have attracted considerable attention. Here, we use Density Functional Theory (DFT) to predict that the novel n = 6 iron ladder BaFe2Te3 could be stable with a similar crystal structure as BaFe2Se3. Our results also indicate that BaFe2Te3 will display the complex 2×2 Block-type magnetic order. Due to the magnetic striction effects of this Block order, BaFe2Te3 should be a magnetic noncollinear ferrielectric system with a net polarization 0.31 µC/cm 2 . Compared with the S-or Se-based iron ladders, the electrons of the Te-based ladders are more localized, implying that the degree of electronic correlation is enhanced for the Te case which may induce additional interesting properties. The physical and structural similarity with BaFe2Se3 also suggests that BaFe2Te3 could become superconducting under high pressure.arXiv:1912.07749v1 [cond-mat.str-el]