The invention provides a dual-purpose machine for single-person crawling and double-person running, which includes a treadmill, a wheel, a running belt, a pedal, an armrest frame, frame legs, a movable motor, a guide rail and a lead screw. Its beneficial effects are: crawling and running exercises can be performed without electric power assistance. The machine is equipped with four independently working running surfaces in the running platform, corresponding to the palms and feet, each palm and foot It can move relatively independently or stand still, adapt to the crawling action of the human body, meet the needs of the majority of crawling enthusiasts, and fill a gap in sports and fitness equipment; in the case of electric assist, this machine can also be used as a single or double treadmill Use, add movable motor, transmission device, armrest frame, control panel, support legs and partitions, the running surface can be flat or inclined, the function conversion and adjustment are convenient, the structure is simple, there are few parts, and it can be disassembled and installed freely. Folding storage, low production cost, high safety and stability, suitable for ordinary household installation, easy to popularize and promote.