Pressing rod dismounting device

The utility model relates to the technical field of tools matched with chemical inspection instruments, in particular to a pressing rod dismounting device. The pressing rod dismounting device comprises an upper supporting disc, a lower supporting disc and a screw rod, the upper supporting disc and the lower supporting disc are each provided with a penetrating hole allowing a pressing rod to penetrate through, the upper supporting disc is provided with at least two vertically-through threaded holes, and the threaded holes are formed in the circumferential direction at intervals. After the pressing rod penetrates through the upper supporting disc and the lower supporting disc at the same time, when the threaded rod is screwed, the threaded rod can abut against the lower supporting disc downwards, the lower supporting disc is supported by the testing cylinder, and the upper supporting disc abuts against the head of the pressing rod upwards. After mud shale powder is placed in a testing cylinder, the upper suppor