The invention discloses a seal stamping machine paper detecting device based on a micro-switch. The bottom surface of a paper box of a seal stamping machine is provided with a mounting groove for mounting a switch elastic sheet; the switch electric sheet comprises a fixed end and a movable end; the fixed end is fixed to the inner wall of the mounting groove; the movable end is positioned inside the mounting groove; the top end of the switch elastic sheet protrudes out of the bottom surface of the paper box when the switch elastic sheet is in a reset state; one end of a strut is fixed to a sealstamping machine body; the other end of the strut is suspended above the switch elastic sheet; a pressing plate is installed on the strut through a compression spring and is provided with a penetrating groove for the switch elastic sheet to protrude out; the pressing plate is used for pressing paper on the bottom surface of the paper box under the effect of the compression spring; a contact terminal of the micro-switch is positioned below the movable end; and the micro-switch communicates with a motor of the seal stamping machine. By arranging the switch elastic sheet, the pressing plate andthe micro-switch, the seal stamping machine paper detecting device disclosed by the invention can realize paper detection of a novel seal stamping machine, is ingenious in design, simple in structureand convenient and simple to operate, can make the seal stamping machine stop working when no paper is in the paper box of the seal stamping machine, and prevents waste of ink and the like of the sealstamping machine.