In view of the deformation field measurement problem of steel truss node,in this paper,we carried out a certain coal conveying trestle steel truss node test and performed displacement measurement by using the digital close-range photogrammetric technology. Firstly,we took fixed-point shooting method to obtain the deformation image. Secondly,we conducted the image pre-processing and the pixel coordinate extraction. And finally,we analyzed the displacement change rule of the measurement point. The results show that the measurement accuracy from the close-range photogrammetric technology can meet the needs of the whole deformation test of steel truss node experiment,and the close-range photogrammetric technology has characteristic of simple operation and strong practicability.