Unmanned aerial vehicle and flight control method thereof

The invention relates to an unmanned aerial vehicle and a flight control method thereof. The flight control method of the unmanned aerial vehicle comprises the following steps: acquiring at least one first echo signal of a front area and a second echo signal of a bottom side area, which are detected by a non-rotary radar module of the unmanned aerial vehicle; obtaining space information of an obstacle in front of the unmanned aerial vehicle according to the first echo signal and the second echo signal, wherein the space information at least comprises a horizontal distance of the obstacle relative to the unmanned aerial vehicle and a height difference of the obstacle relative to the ground; when the horizontal distance and the height difference meet an early warning condition, an early warning signal is generated. 一种无人机及其飞行控制方法，无人机的飞行控制方法包括以下步骤：获取该无人机的一非旋转式雷达模块侦测到一前方区域的至少一第一回波信号以及一底侧区域的一第二回波信号。根据该第一回波信号以及该第二回波信号得到位于该无人机前方的一障碍物的一空间信息，该空间信息至少包括该障碍物相对该无人机的一水平距离以及该障碍物相对一地面的一高度差。当该水平距离以及该高度差符合一预警条件时产生一预警信号。