Background: For fracture of the distal radius, open reduction and internal fixation are often used for treatment. In the process of open reduction and internal fixation, it is often necessary to open the pronator quadratus muscle to achieve sufficient exposure. So it's important to know if it's necessary to suture the pronator quadratus muscle. Purpose: To see if suturing the pronator quadratus during the treatment of fracture of the distal radius would improve limb function. Methods: 126 patients were selected for our study. These patients had open reduction and internal fixation.During the procedure, the pronator quadratus is cut open to allow the plate to be placed.Before the surgery was completed, the pronator quadratus muscles of these patients were stitched together. After the fracture healed, the patients underwent surgery to remove the internal fixation. These patients received wrist function scores prior to removal of internal fixation.The healing of the pronator quadratus was investigated during surgery. These patients were grouped according to the healing of the pronator quadratus. Functional scores were compared between the two groups Results: 23 patients were considered to have muscle healing during surgery. However, in these patients, the PQ muscles were obviously atrophic, with scar hyperplasia and fibrosis.The muscle fibers were loose and thin, and the number was reduced. At the same time, the remaining muscle fibers have different degrees of adhesion with radial carpal flexor muscles, steel plates and interosseous membrane. According to the intraoperative situation,23 patients were included in group A and 103 patients were included in group B. There were no statistically significant differences in age and fracture type between group A and group B.At the same time, there were no statistically significant differences in isokinetic forearm pronation strength and clinical outcomes including grip strength, wrist ROM, and PRWE scores between the two groups.Conclusions: this study demonstrates that whether the PQ muscle healing or not does not affect the outcomes of volar plating for distal radius fractures in terms of isokinetic forearm rotation strength, grip strength, wrist ROM, and PRWE scores.