Abstract: Objective To investigate the clinical applicable value of three-dimensional and multiplane reconstruction with helical CT in bone and arthrosis trauma. Methods sixty–five cases with bone and arthrosis trauma underwent helical CT volume scans. To be reconstructed with MPR and 3D techniques, All images were observed and analysed. Reconstruction were done with the results of surgery. Results SCT MPR and 3D imaging could produce clear and comprehensive images of line of fracture and dislocation or piece of fracture. Reconstruction after operation could showed the shape and location of the internal fixation or fracture diaplasis. SCT 3D imaging went all the way with the results of surgery. Conclusion Spiral CT MPR and 3D reconstruction techniques, as an important complement of trans-axial images, can provide an advantage of showing the fracture more accurately and stereoscopically. It is the best and fast non-invasive imaging method in showing the trauma of bone and arthrosis. It is of high value in diagnosis of bone and arthrosis trauma in clinical practice.