The invention relates to a testing device for measuring a static three-component force coefficient of a cable-suspended piping bridge. The testing device comprises a piping bridge section model and a fixed support, wherein the piping bridge section model is separated into an upper model part and a lower model part by a central axis, the fixed support comprises a crossbeam and two stand columns at two ends of the crossbeam, the top ends of the stand columns are connected with the crossbeam, the bottom ends of the stand columns are fixed on the ground, the crossbeam penetrates through the piping bridge section model, and a measuring balancer and a levelling cushion block are sequentially arranged between the crossbeam and the lower model part from top to bottom. The crossbeam of the fixed support is arranged inside a pipeline of the cable-suspended piping bridge section model, influence on flowing around characters of the cable-suspended piping bridge from the fixed support is avoided, and simulation precision of the static three-component force coefficient of the cable-suspended piping bridge in a wind field can be increased remarkably.