The invention provides a UAV based on a four-way angle correction and a calibration control method thereof. The UAV includes a machine body, four machine arms connected with the machine body, corresponding rotor and power devices thereof, and an angle correction device. The angle correction device comprises first, second, third and fourth measuring devices and a calibrator, the first, second, third and fourth measuring devices are respectively disposed on the four machine arms through connecting rods respectively, and the first , second, third and fourth measuring devices can respectively be retracted and accommodated in the four machine arms. The calibrator is disposed on the machine body through a flexible connecting wire, and the calibrator can be accommodated inside the machine body. A distance measuring sensor is respectively arranged on the outer wall of the outer shell of each of the first and the second measuring devices, and the calibrator has a scale and is provided with inductors for sensing signals and timely recording sensing positions. The lower end of the calibrator is provided with a calibration sensor to improve the measurement precision. The angle correction of flight equipment is performed after precise measurement of the inclination angle change trend, so that the monitoring efficiency is improved and the monitoring precision is improved.