Smooth transition method for controlling track flight height of unmanned aerial vehicle (UAV)

The invention provides a smooth transition method for controlling track flight height of an unmanned aerial vehicle (UAV), relates to the field of UAV controlling, and solves the problems that loads of the UAV are large and the flight security is reduced because the height control is performed by only utilizing height information in an UAV track flying process, and the UAV climbs with the maximum capacity in an initial transition period. The smooth transition method comprises the following steps: receiving flight destination information, flight speed and existing position of the UAV; computing the height difference between a front destination and a back destination, and the linear distance in a horizontal direction according to the current destination information at two ends of the destination; computing a height set value by utilizing a nature exponential rule according to the information; inputting the height set value, which is computed in real time, into a height control system, so as to achieve the smooth transition of height control. According to the smooth transition method for controlling the track flight height of the UAV, the height command is sent in real time according to flight destination information based on the natural exponential rule, overlarge temporary load in a UAV track flight height controlling process can be reduced, and the flight security of the UAV is improved.