Abstract: To ensure that the concrete and steel bones in corrugated web PEC (Partially Encased Composite) Column maintain good synergistic working ability, this paper designed 6 naturally bonded and 12 corrugated web PEC columns with stud considering the effects of stud number and spacing, web corrugated angle, concrete strength and anchorage length on interface properties, and conducted push-out tests of them. The failure modes of the specimens were determined according to load-slip curves, cracks and stud morphology. The results show that the slip is apparent only when the naturally bonded specimens reach the ultimate load and fail rapidly with low bearing capacity. The increase of the anchorage length can increase the characteristic bond stress, and a larger web corrugated angle can increase the initial slip load P₀. The welding of studs increases the bearing capacity significantly and also changes the failure pattern of the corrugated web PEC columns. The shear capacity increases approximately linearly within a specific range with the number of studs. The characteristic bond stress can be increased by 2-4 times compared with the naturally bonded specimen. As the web corrugated angle increases, the residual load P_r gradually increases, and the effects of concrete strength and stud spacing on the failure mode of the specimen with studs are more significant. The characteristic curves of the two types of specimens can be divided into ascending section, descending section and residual section, and the bond stress calculation formula and bond-slip constitutive model of the naturally bonded specimens and the stud specimens are respectively fitted. The calculation results of the bearing capacity formula of the stud specimens are in good agreement with the experimental results, which can provide a specific reference for practical engineering.