The invention relates to an electric-control automatic release device, belongs to the field of electromechanics and can be applied to the fields of airborne landing, air drop, helicopter suspension and the like. The electric-control automatic release device is characterized in that an upper connection shaft (1) is sleeved by a lower connection shaft (14), a steel ball (9) is arranged in a conical hole of the low connection shaft (14), a spring (4) is arranged at the upper end of the low connection shaft (14), a lining (7) is pressed on the spring (4) through a gasket (3), a pin shaft (2) is coupled into a hole in the lining (7), a cutter (6) is arranged in the upper connection shaft (1), a connector (8) is arranged at the lower end of the cutter (6), a connection rope (5) penetrates through a hole in the cutter (6) to be tied on the pin shaft (2), a controller (13) is arranged on a release lock, and an indicator lamp (10), a liquid crystal display screen (11), an operation button (12), a control circuit board (15) and a battery (16) are arranged on the controller (13). The electric-control automatic release device disclosed by the invention has the advantages of being simple and compact in structure, convenient to use, stable in performance and free of potential safety hazards and achieving intelligent control and air release.