The spindle box and worktable bracket can lift up and down along the upright, as well as rotating 180° clockwise or anticlockwise along the upright, the worktable also can rotate 180° clockwise and anticlockwise in the bracket. The spindle box worktable can rotate 45° clockwise and anticlockwise in transverse plane on the spindle box worktable, therefore, the machine tool is light, flexible and reliable for use.