Unbalance-load-resistant cable force sensor capable of replacing force measuring unit in service and replacement method of cable force sensor

The invention discloses an unbalance-loading-resistant cable force sensor capable of replacing force measuring units in service and a replacing method thereof. The sensor comprises an upper support plate, a lower support plate and i force measuring units, the force measuring unit comprises a force bearing column and a sensing part, the force bearing column is connected with the upper support plate and the lower support plate respectively, a longitudinal neutral axis of the force bearing column is provided with a mounting groove, and the sensing part is mounted in the mounting groove; the force value measured by the cable force sensor is the sum of the force values measured by the i force measuring units. The method comprises the following steps: embedding one end of the scissor-shaped seesaw into a gap between the adjacent force bearing columns, connecting the other end of the scissor-shaped seesaw with the jacking jack, driving the scissor-shaped seesaw to jack up the upper support plate of the cable force s