The invention relates to an electrostatic spinning method and a device for controlling fiber adhesion. An oil sprayer and a drying device relative to the surface of a collector are arranged on an electrostatic spinning device comprising an electrode spinneret and the collector; fibers initially formed on the collector are sprayed with oil; the oiled fibers leaving the collector are dried; and spray flow, drying speed and temperature are matched so as to effectively control the fiber adhesion in the process of electrostatic spinning and ensure that the fibers are kept in a mutually separate state or a controlled adhering state during follow-up treatment. The method can also be used for the surface function modification of electrostatic spinning fibers to prepare functional electrical spinning fiber, and is convenient and easy to operate.