The invention provides an integrated single-
fiber droplet 
manipulator. The integrated single-
fiber droplet 
manipulator is characterized in that the device is composed of a section of multi-
core optical fiber comprising a cladding and a 
fiber core, the fiber end is ground to form a cone 
frustum fiber end, the end face of the cone 
frustum fiber end is provided with a layer of 
liquid injection smoothporous 
surface film doped with a photosensitive material, and the film is provided with an array groove structure filled with a lubricating agent; when light 
waves transmitted by the fiber core are reflected by the cone 
frustum fiber end and then gathered to the 
liquid injection smooth porous 
surface film on the end face, the light 
waves are absorbed and converted into 
heat energy by the photosensitive material, a 
temperature gradient field is formed in an 
irradiation area, droplets attached to the 
liquid injection smooth porous 
surface film generate 
wetting gradient force under the influenceof the 
temperature gradient field, the droplets are affected by force, the posture of the droplets changes to generatesdirectional sliding, and finally, the droplets are controlled under the action of different 
temperature gradient fields by controlling the power of the light injected into the fiber core. The 
manipulator can be applied to the fields of hydromechanics, 
biology, 
medicine and the like.