Abstract: Subsynchronous oscillation（SSO） occasionally occurs when doubly-fed induction generator（DFIG）-based wind farm is integrated with the voltage-source-converter based high voltage direct current（VSC-HVDC） system or the series-compensated line. However, it is not clear whether SSO will emerge when the DFIG-based wind farm is integrated with the line-commutated-converter based high voltage direct current（LCC-HVDC） system, which should be urgently studied. The small-signal model of the research system was established by using modular modeling method, and validated by comparing time-domain step responses between the small-signal model and the electromagnetic transient model in PSCAD/EMTDC. Then, the interaction between DFIG-based wind farm and LCC-HVDC was studied by eigenvalue analysis and participation factor analysis, and the influence of system parameter variation on stability was analyzed. The results show that there is no oscillation mode in which the state variables of DFIG-wind farm and LCC-HVDC participate together, which indicates that the interaction between DFIG-wind farm and LCC-HVDC is very weak and will not lead to SSO. When the number of DFIGs or the length of transmission line increases, the damping of generator mode increases, and the damping of phase-locked loop-DC voltage outer loop mode decreases.