The invention discloses a printed circuit board detection floating top board device. The printed circuit board detection floating top board device includes an operating console, a side conveyer belt,a transverse board, a lifting-up deduster and a supporting rod, wherein the lifting-up deduster includes a bearer, a circuit board flexible positioning device, a dust-absorbing magnetic diversion device, a piston rod and an oil cylinder. The printed circuit board detection floating top board device is advantaged in that through the circuit board flexible positioning device, stability of the circuit board is guaranteed during circuit board lifting-up inspection, focusing accuracy of a lens is improved, through the dust-absorbing magnetic diversion device, dust and fine hairs falling on a surface of the board due to static electricity can be quickly sucked into a filter box, so accuracy of images during circuit inspection is guaranteed, through matching the circuit board flexible positioningdevice and the dust-absorbing magnetic diversion device, the static electricity generated by the printed circuit board in the transportation friction can be solved, the dust or the fine hairs from the workshop air is attracted to the board, and a problem of influence on accuracy of the images during focusing imaging is solved.