A detachable touch structure for a portable electronic device is disclosed. The detachable touch structure comprises a flexible board, a flexible touch panel, a control module, and a linkage element; the flexible touch panel is superimposedly disposed on the flexible board; the control module is connected with the flexible board and electrically connected with the flexible touch panel, and the control module comprises two sliding slot structures each comprising a first sliding slot and a second sliding slot communicated with each other; the linkage element comprises two positioning levers, the linkage element has one end pivotally connected with the flexible board and the other end movably connected with each one of the sliding slot structures via each one of the positioning levers respectively. When two ends of the flexible board are bended by force, the detachable touch structure can be in a tablet form or a mouse form.