The present invention provides an industrial-grade active optical device manufacturing method. The method comprises the following steps: designing a bevel edge at the wall thickness center at the lower end of a metal tube body; designing the outer circumference diameter at the lower end of the metal tube cap which is larger than the outer circumference diameter at the upper end of the metal tube body; soldering and sealing the metal tube body on a TO pedestal in the nitrogen environment by using the resistor soldering and sealing technology; performing twice artificial optical coupling, and at the same time observing the coupling waveform and the coupling response value in the coupling process; and finally, performing laser welding between the coupling steel needle and the metal tube cap after the completion of the first time coupling, and performing laser welding between the metal tube cap and the metal tube body after the completion of the second time coupling. The industrial-grade active optical device manufacturing method is large in environment operating temperature range, high in the measurement index, stable in the performance, and safe and reliable, and is able to improve the features of an active device to allow the active device to normally work in the condition of the work temperature from -40 to 85 DEG C, ensure the invariant feature and satisfy the modern optical communication system.