As an important function of the automatic flight control system of modern air transport aircraft, flight director provides flight attitude control instructions for the automatic pilot/pilot, which is of great significance for reducing the pilot"s workload, improving the pilot"s manual operating quality, enabling the aircraft to fly on the scheduled flight path and ensuring flight safety. At present, there are few researches on flight characteristics based on flight director, so A320 and ARJ21 are selected to analyze their flight characteristics of following the guidance in the go-around mode respectively. It is found that the pitch guidance of A320 aircraft during the go-around phase is to adjust the pitch first to quickly reach the positive climb rate, and then the pitch Angle instruction is given by the speed reference system to track the target speed principle under the premise of maintaining the minimum climb rate. The ARJ21 is given pitch Angle command in three stages, namely initial fixed pitch Angle control, pitch control based on target track Angle and pitch control based on target speed. Through curve similarity analysis of QAR data, it was found that the go-around guidance mode of the ARJ21 model has a better following effect. The research results provide a new perspective for subsequent pilot manual control quality evaluation and provide a new idea for the development of new aircraft models in the future.