The invention provides a running machine based on an internet and an internet competition system. The internet running machine comprises a running platform, a main control device, a network module and a damper, wherein the running machine adopts an arc caterpillar-type running platform of which the front and rear ends are higher and the middle part is lower, initiative running is formed by virtue of the gravity action, the impact injury on knee joints is reduced, the damper can limit the highest motion speed, and the motion safety is further guaranteed. The running speed is correspondingly adjusted by virtue of the foot settling speed of a runner, so that the foundation of a competition is realized. By combining the network module, a mobile terminal and a cloud platform, various participating running machines are interconnected to form a network, so that the running machines distributed in different places in the world can participate in the network competition in real time, the main control device generates a virtual image of each competitor and transmits the virtual image to a virtual-reality terminal, each competitor stands on a corresponding position according to the data information of the corresponding running machine, and a competition result is pushed to the mobile terminal in real time. By virtue of the internet competition, the reality, challenge, fun and sociability of the body building by utilizing the running machine can be improved, and the body building impetus and the body building effect can be improved.