The invention discloses a surface wave energy coupling head suitable for microwave physiotherapy, and belongs to the field of microwave physics. The surface wave energy coupling head comprises a flexible dielectric substrate, input and output coaxial connectors arranged at the two ends of the dielectric substrate, a metal grounding plate configured to cover the back surface of the dielectric substrate, and a waveguide wire structure arranged on the front surface of the dielectric substrate. The two ends of the waveguide wire structure are respectively connected with the inner conductors of the input and output coaxial connectors. The outer conductors of the coaxial connectors are connected with the grounding plate. During working, microwaves on the waveguide wire structure exist in the form of surface waves. Compared with an existing microwave physiotherapy head, the above surface wave energy coupling head can be completely attached to the diseased part of a user to treat the diseased part. Meanwhile, no microwave leakage exists. Therefore, the clinical application range of the microwave physiotherapy is greatly expanded.