The invention relates to the technical field of circuit board welding accessory devices, and particularly relates to a circuit board welding auxiliary device for naked-eye 3D display processing. A welding gun can be safely placed conveniently, and the height of a working plate can be conveniently adjusted according to the requirements of workers; and the circuit board can be conveniently fixed when the circuit board is placed; the circuit board welding auxiliary device comprises a bottom plate, two sets of supports and the working plate; the circuit board welding auxiliary device further comprises a containing box and four groups of supporting legs, a containing cavity is formed in the containing box, and a taking and placing opening is formed in the top end of the containing box in a communicated mode; the circuit board welding auxiliary device further comprises a push plate, a push rod and a push block, wherein a soldering flux block is arranged at the top end of the push block; thetwo groups of supports comprise air cylinders, a telescopic rod, a pressing plate and a reset spring; the circuit board welding auxiliary device further comprises two groups of fixing columns, two groups of pressing rods, two groups of fixed spring sets and two groups of pressing blocks, wherein a containing groove is formed in the left side and the right side of the top end of the working plate,and ball bearings and limiting pieces are arranged in the two groups of containing grooves, and blocking pieces are arranged at the top ends of the two groups of containing grooves.