The invention relates to the technical field of two-sided flexible circuit board accessory devices, in particular to an auxiliary clamp for two-sided flexible circuit board printing correction. The auxiliary clamp comprises a left fixing plate, a left upper retaining plate, a left lower retaining plate, a left upper clamping plate, a left lower clamping plate, a left push plate, a left adjusting screw rod, a left knob, a right fixing plate, a right upper retaining plate, a right lower retaining plate, a right upper clamping plate, a right lower clamping plate, a right push plate, a right adjusting screw rod, a right knob, a left upper side plate, a left blocking plate, a left lower side plate, a left rotating shaft, a left supporting plate, a left hand wheel, a right upper side plate, a right blocking plate, a right lower side plate, a right rotating shaft, a right supporting plate, a right hand wheel, a left placement plate, a right placement plate, a left supporting plate, a right supporting plate, a left adjusting block, a right adjusting block, a first
threaded pipe, a first
threaded rod, an upper connection slide column and a lower connection slide column. The auxiliary clamphas advantages that clamping effects can be improved, and reliability in use is improved; practicality is improved due to availability for direct turning; due to expansion adjustment, printing qualityis improved, and limitation in use is lowered.