The invention discloses an electro-spinning device for auxiliary inducing of batch manufacturing of diameter-controllable nano-fibers, and relates to an electro-spinning device. The electro-spinning device comprises a solution trough, a liquid outlet valve, a fiber diameter control device, an ultrasonic vibration exciter, a liquid inlet pipeline, a liquid inlet valve, an ultrasonic liquid level sensor, auxiliary inducing devices, an industrial CCD image sensor and a collecting device, wherein the fiber diameter control device is provided with adjusting sliding blocks, precise screw rods and polish guide rods; each auxiliary inducing device is provided with linear guide rails, sliding blocks, a sliding block connecting rod and mounting bases; the collecting device is provided with auxiliary feeding rolling wheels, a collecting board, a feeding cylinder, a collecting device hanging board, a motor, a driving feed cylinder and feed auxiliary rolling wheels. According to the device, the ultrasonic vibration exciter is utilized to generate solution waves, and the auxiliary inducing device is utilized to perform jet flow injection control in a matching manner; intervals between polar plates are utilized to restrain a jet flow initial diameter and migration; the collecting device which can feed continuously and an auxiliary inducing process are utilized, and the image sensor is cooperatively used to recognize, so that the defects that the yield is low, the diameter distribution is large in difference, the bead-shaped structure is provided, and the nozzle is easy to block are overcome.