Abstract: For problems of complicated process, low accuracy and high cost in existing pick wear measurement methods, a mine-used pick wear measurement system based on shape from focus was designed. The collected sequence images of cone on top of pick are processed through shape from focus technology, so as to obtain 3D shape recovery diagram of cone on top of pick. On this basis, depth information of surface of cone on top of pick is gotten, thus volume of cone on top of pick is calculated, and wear volume of pick is obtained by use of difference method. The test result shows that measurement accuracy of the system is 97.68%.