The utility model provides a preparation subpackaging device which comprises a main pipeline,
branch pipelines, a driving pump and an
exhaust pipe, the near end of the main pipeline is communicated with a
stock solution bag, a plurality of
branch pipelines are communicated with the main pipeline, one of the
branch pipelines is communicated with the far end of the main pipeline, each branch pipeline is independently provided with a subpackaging valve and a subpackaging container, and the driving pump is communicated with the
exhaust pipe. The driving pump is arranged on the main pipeline between the branch pipeline and the
stock solution bag, the
exhaust pipe is arranged on the main pipeline between the driving pump and the
stock solution bag, a main valve is arranged on the main pipeline between the exhaust
pipe and the stock solution bag, and an
exhaust valve is arranged on the exhaust
pipe. According to the preparation split charging device, only one exhaust
pipe is arranged, contact with outside air is reduced, the risk that microorganisms pollute a pipeline is reduced, the split charging amount is controlled through the weighing sensor, the split charging uniformity and accuracy can be ensured, high-speed split charging is achieved, residual preparations in the pipeline can be emptied to be recycled, and the production efficiency is improved. And waste is reduced.