Fool-proof jig capable of intercepting multiple steel needles of product and automatic die cutting machine

The utility model relates to the technical field of switch assembly, in particular to a fool-proof jig capable of intercepting multiple products and poor steel needles and an automatic hydraulic cutting machine, and the fool-proof jig is mounted on the automatic hydraulic cutting machine. The fool-proof jig comprises an assembling base used for assembling a steel needle and a bottom shell, a pressing block arranged above the assembling base and used for pressing the steel needle into the bottom shell and a driving mechanism used for driving the pressing block to move up and down, a contact probe is fixed to the position, corresponding to the position nearby the steel needle, of the side face of the pressing block, and the contact probe is electrically connected with a microswitch. The microswitch is in signal connection with the automatic hydraulic punching machine, and the automatic hydraulic punching machine is electrically connected with an alarm device. When multiple steel needles exist, after the steel n