Compressed air preparation system

The utility model provides a compressed air preparation system, and belongs to the technical field of compressed air preparation. The air compressor is electrically connected with a power grid system, the air inlet end of the air compressor is provided with an air inlet valve, and the air outlet end of the air compressor is provided with a flow sensor; the air utilization assembly comprises an exhaust main path, a first exhaust branch, a second exhaust branch, an air storage tank and a user side, the input end of the exhaust main path and the input end of the first exhaust branch are communicated with the air outlet end of the air compressor, a first stop valve is arranged on the exhaust main path, the output end of the first exhaust branch is communicated with the air inlet end of the air storage tank, and a second stop valve is arranged on the second exhaust branch. A second stop valve is arranged on the first exhaust branch, one end of the second exhaust branch is communicated with the air outlet end of th