Low-frequency therapeutic apparatus

The utility model provides a low-frequency therapeutic instrument which comprises a host, an electrode plate and a substrate. The host is used for controlling pulse current; a first clamping groove and a second clamping groove are outwards formed in the two longitudinal ends of the host respectively; the substrate is horizontally arranged and extends in the longitudinal direction, and an electrode plate is arranged on the substrate; a first buckle and a second buckle are arranged at the two longitudinal ends of the base plate in an upward protruding mode respectively, the first buckle is clamped with the first clamping groove, and the second buckle is clamped with the second clamping groove. A buckle plate is arranged on the base plate, and the first buckle is arranged on the buckle plate; a rotating piece and an elastic piece are arranged on the buckle plate, the buckle plate can rotate around the rotating piece in the longitudinal direction, and the elastic piece can confront rotation of the buckle plate; t