The present invention provides a light-reflecting device for a photographic light, comprising a positioning member which is engageable with a support member, a top end of the support member being provided with a jacket; wherein the positioning member is provided with a locking mechanism of the jacket, the locking mechanism being provided with a movable lock button, the lock button being movably connected to the jacket. The present invention has the following beneficial effects: compact integral structure, convenient disassembling operation, and long life time.
