Objective　To provide anatomical data for local blocking treatment and the needle knife therapy through investigating features and classification of the bony styloid process of radius.　Methods　The morphology of adult styloid process of radius was studied on 61 specimens. The sulcus and the bony ridges on styloid process of radius were observed. The distance from processus of the palmar bony ridge to the processus of the posterior bony ridge and the distance from the processus of the palmar bony ridge to the sharp point of styloid process of radius were measured and analyzed.　Results　In 39 specimens (63.93%), styloid process was deep and divided into two sulcuses by a tiny bone ridge. In 17 specimens (27.88%), styloid process was smooth without the tiny bone ridge. Bony sulcus was complanate and unconspicuous in 5 specimens (8.19%). The palmar bony ridge was more prominent than the posterior bony ridge for all the specimens. The distance was about 11.48±1.36mm from the processus of the palmar bony ridge to the processus of the posterior bony ridge. The vertical distance was 17.00±2.02mm from the processus of the palmar bony ridge to the sharp point of styloid process of radius.　Conclusions　 The processus of the palmar bony ridge was the most prominent part on styloid process of radius, which can be regarded as a positioning mark during the clinical operation.