The utility model relates to a 11 imitate and jointly to prepare sodium potassium device, by ten thousand tonnes of quadruple effect vacuum evaporation prepare the sodium chloride device, ten thousand tonnes of quadruple effect vacuum evaporation further prepare the sodium chloride device and triple effect potassium chloride device is established ties. Raw materials brine gets into V and imitates evaporating pots and carry out ten thousand tonnes of vacuum evaporation in the second cover after ten thousand tonnes of quadruple effect vacuum evaporation in the first cover prepares the sodium chloride device, and is last, changes over to XI over to and imitate the evaporating chamber jars and carry out triple effect potassium chloride and prepare. This 11 effect is jointly prepared in the sodium potassium device, owing to follow the mother liquor that comes out in ten thousand tonnes of salt manufacturing workshops in the first cover, the raw materials in ten thousand tonne salt manufacturing workshops can directly be overlapped as the second, shine feeding raw materials temperature height than direct from the beach, so the steam power consumption is lower than single quadruple effect vacuum evaporation salt manufacturing, the energy of mother liquor itself can recycle like this, the power steam bad news have been practiced thrift greatly, and simultaneously, can save the heat exchanger in ten thousand tonnes of salt manufacturing workshops in the second cover again, because the mother liquor directly gets into second cover evaporating pot, the area that shines the salt pond has again also been practiced thrift.