Owing to its high photosensitivity and high accurate alarm rate,gallium oxide based solar blind photodetectors attract much attention in military and civilian fields.To meet the requirements of the modern device,gallium oxide based photodetector desired to be flexible and self-powered.However,there are few reports about Ga２O３ self-powered flexible photodetectors.In this work,we grew β-Ga２O３ nanowire on a flexible glass fiber fabric substrate and constructed an Ag/β-Ga２O３ Schottky junction.Thanks to the build in field,the Ag/β〖ＷＴＢＺ〗-Ga２O３ photodetector can work without an extra power.Meanwhile,the photodetector exhibited an ultra-low dark current (0.2 pA at 0 V),a high light-to-dark ratio (~500),a fast response speed (0.46/0.41 s) and a high detectivity of 6.8×109 Jones.The device also exhibited good mechanical properties.The results show that Ag/〖ＷＴＢＸ〗β-Ga２O３ Schottky junctions have promising applications in the field of deep-UV detectors and provide a new idea for the development of flexible self-powered detection technology.