The invention discloses a cable-stayed cable force detection device. The cable-stayed cable force detection device comprises a box body, the box body is internally provided with a driving mechanism and an analysis mechanism; the driving mechanism comprises a driving shaft and a driven shaft which is used in cooperation with the driving shaft, and a motor is arranged at one end of the driving shaft; the analysis mechanism comprises a control analysis system. The cable-stayed cable force detection device has the advantages that operating personnel can directly control the device to conduct workof moving along a cable-stayed cable, data collection, data analysis, data returning and the like, cable force detection of an inhaul cable on a cable-stayed bridge is achieved, the detection result can be more accurate, the detection time can be shortened, and the detection efficiency can also be improved. By means of the cable-stayed cable force detection device, the cable-stayed cable force detection efficiency is improved, the detection cost is saved, and the cable-stayed cable force detection device is applicable to marketing.