The utility model relates to a synchronous fastener of wheel base adjustable biax for non -blackout operation, including motor, strike axle, first and second output shaft, the motor exerts through drive strike piece and rotates for strikeeing the axle, it has the first and second two to strike the gear to strike epaxial cover, and the interval is equipped with the spring between two gears, two are struck the gear vertical direction and correspond respectively and drive first and second output gear, and first and second output gear connect first and second output shaft at outside the correspondence, and the output shaft drives removable sleeve respectively, the second hits the gear and the 2nd output gear links together through the connecting block fitted bearing, and second strike gear, the 2nd output gear, connecting block pass through screw rotating member synchronous motion. When this novel assurance did not have a power failure two nuts fastening gold utensils such as installing insulation piercing connectors, two fastening nut can synchronous tightening. Interval between two output shafts is adjustable, and it is also removable to export epaxial sleeve part to can be applicable to the gold utensil of different specifications.