The invention discloses a movable accurate-and-controllable-concentration uniform-sand-discharging sandstorm weather simulating and experiment system which relates to the technical field of a device for corona characteristic testing. The system comprises two parts, namely a high-pressure air blowing subsystem and an accurate-and-uniform sand feeding subsystem. The high-pressure air blowing subsystem comprises an air compressor, an air storage tank, an air dividing bag, an electromagnetic valve, an electromagnetic valve remote control device and a Venturi tube. Except for the electromagnetic valve and the electromagnetic valve remote control device which are connected through a cable, other parts are successively connected by means of pressure-resisting air pipes. Air supplying pressure ofthe air storage tank is controlled through adjusting the electromagnetic valve. High-pressure air enters the Venturi tube. The accurate-and-uniform sand feeding subsystem comprises a material storagehopper, a vibrating device, a butterfly valve, a sand buffering device and a base. The sand is quantitatively fed to the sand buffering device from the material storage hopper through the butterfly valve. The movable accurate-and-controllable-concentration uniform-sand-discharging sandstorm weather simulating and experiment system has advantages of low cost, high movability, high continuousness insand discharging, and long diffusion distance.