The utility model provides a parallel groove clamp for power transmission and transformation. The parallel groove clamp comprises a C-shaped bow rack as a clamp support main body, and two lead pressing blocks disposed in the C-shaped bow rack and respectively impacted with grooves at two ends of the C-shaped bow rack; a taper hole is formed at opposite ends of the two lead pressing blocks, and the taper hole is equipped with a taper pin used for extruding the two lead pressing blocks respectively towards the grooves at the two ends of the C-shaped bow rack; and two ends of the taper pin are respectively connected with screws, and the screws are respectively sleeved with nuts used for fixing the taper pin and the lead pressing blocks. Two leads are respectively disposed between the grooves at the two ends of the C-shaped bow rack and the two lead pressing blocks, the nuts at the two ends of the taper pin are screwed, and then the two lead pressing blocks are extruded by the taper pin; the leads can be clamped only by screwing the fixed nuts at the two ends of the taper pin, and the implementation process is fast, convenient, safe and reliable; and the parallel groove clamp has the characteristics of simple structure and convenient assembly and disassembly, and compared with a traditional clamp, repetitive tasks of workers are reduced, and working strength is reduced.