For the processes of the approach and glide-down in helicopter landing, the landing strategy of shipborne helicopter is researched to study the influence of airflow environment on flying qualities. The airflow distribution on flight deck is analyzed, and the result shows that the downwash airflow distribution has relation with the flight height, that is, the lower height, the bigger airflow value. Besides, the downwash airflow mainly concentrates on the upwind approach chart, which has influence on helicopter flight qualities. The results of helicopter trim states in different wind on deck (WOD) are analyzed, including the required rotor power, control sets, body attitudes, etc, which show that the suitable approach method is the beneficial to the helicopter safety during landing process.