The utility model discloses a centring plate for tensioning a front-clamping type jack, and belongs to the field of pre-stress construction technology. The centring plate is mainly used for quick counterpoint of a steel strand and a tool anchor ring, and is characterized in that the centring plate is a round plate structure, and holes corresponding to holes in a tensioning limit plate are formed in the centring plate. Conical guide devices (8) are arranged on the outer sides of at least two holes. The centring plate for tensioning the front-clamping type jack is simple in structure, and convenient to use, is matched with the front-clamping type jack to use, can quickly and accurately guide the steel strand into the tool anchor ring inside the jack, achieves quick counterpoint operation, can greatly saves process time, and improves work efficiency.