In order to ensure normal and stable operation of a new type of permanent magnetic suspension belt conveyor, simulation on self-adaption of the conveyor"s suspension support device under random loads was studied in this paper. On the basis of reasonable assumptions, the suspension support device of vertical random vibration model was built. And the virtual prototype of device underSinter-platform andSmulti-softwareSjoint simulation environment was established through 3D entity modeling, self-adaptive control system modeling, the definition of external random loads and the application of boundary conditions. Then the simulation was carried out. The results showed that, under the action of random loads, instability of conveyor belt running state occurred. Accompanied by the change of conveyor belt"s suspension air gap, the magnetic levitation force was further adjusted. Thus the suspension system achieved running balance again. It is proved that the suspension support device of belt conveyor have self-adaptive dynamic adjustment function by the experimental results.