【摘要】The invention belongs to the medicine body mechanics measurement field, and relates to a human subject researching device based on simulation of gravity load by a nuclear-magnetic resonance machine, which is characterized in that: a coil liner plate I is connected with a coil liner plate II to form a coil liner plate, and a slipway liner plate I is connected with a slipway liner plate II to form a slipway liner plate the slipway liner plate is provided with foot slipways, a buttock slipway, a buttock extension slipway and a pulley block, the coil liner plate is provided with coils, and a coil auxiliary liner plate is arranged on the tail part of the coils and a supporting bracket is arranged on one end of the device, one end of a hauling rope is fixed on the foot slipways, the other end of the hauling rope is connected with a scale pan, and the scale pan is arranged on the supporting bracket. The human subject researching device can simulate the gravity of the body in a standing posture at a full-flat state of the human body, help can be provided for utilizing nuclear magnetic resonance (MRI) image to research the influence of the long-term gravity on the degradation of sacroiliac joint, so original data of the degradation reason of the sacroiliac joint can be obtained.