Abstract: Abstract In the method of multi-table and multi-record for main memory management, the paper introduces the means to allow users to define the space of working area and tables in main memory by users. The system will allocate the maximum space and the number of tables, if users abandon the definition. The method presents one-timeprocessing technique for a record block including the multi-record, that means the system takes the block as a unit to process and interchange data between main memory and disk. Experiments have proved that this method can reduce the time of tables swap, records swap and unnecessary computations and examinations, increase the access efficiency of sequential and random operations.