The invention discloses a method for positioning a human body endoscope capsule by using electromagnetic wave phase differences, which comprises the following steps of: S1, using the endoscope capsule in a human body to emit electromagnetic waves outwards, wherein the electromagnetic waves are signals comprising phase information; S2, using N antennae distributed in a flat plate to receive the electromagnetic waves on the colpus or the back of the human body; and S3, by using one antenna in the flat plate as a reference antenna and using the phase of an electromagnetic wave signal received by the reference antenna as a reference phase, and according to the linear distance between i antennae in the N-1 antennae and the reference antenna and the difference between the phase of an electromagnetic wave signal received by each one of the i antennae and the reference phase, calculating the linear distance between the endoscope capsule and the reference antenna and the distance between the endoscope capsule and the i antennae respectively so as to determine the position of the endoscope capsule, wherein i is an integer between 3 and N-1, an N is an integer larger than 3. The technical scheme of the invention can improve the positioning accuracy, has a low cost, and is simple to operate.