Abstract: To study the mechanical properties of steel-engineered cementitious composite (ECC) composite girders with corrugated webs, two flat webs and two corrugated webs H-shaped steel composite girder experiments were conducted to investigate failure modes, bearing capacity, stiffness, crack propagation mode and strain distribution under the negative moment. Meanwhile, ANSYS finite element software was used to carry out parametric analysis of steel-ECC composite girders with corrugated webs. The results show that the failure modes of four girders are bending failure. Compared with the steel-normal concrete composite girders with corrugated webs, the flexural bending capacity and stiffness of the steel-ECC composite girders with corrugated webs are respectively increased by 2.5% and 20.4%. The crack distribution of ECC plate of steel-ECC composite beam is dense, the width is small, mainly micro-crack, and the crack control ability is remarkable. The shear stress distribution of corrugated webs is more uniform, and the maximum shear stress is lower than that of flat webs. The shear performance of composite girders with corrugated webs is better than that of composite girders with flat webs; finite element parametric analysis shows that: with the increase of web height and flange thickness, the flexural bending capacity of steel-ECC composite girders with corrugated webs under the negative moment is respectively increased by 21.5% and 36.4%, and the increase of flange width by 2 mm is close to changing the bearing capacity of 50 mm web height; and optimizing the flange width can effectively improve the flexural bending capacity of the structure.