A static memory device and data read method

The invention discloses a static memory device and a data reading method thereof. The static memory device comprises a plurality of memory cells, a plurality of virtual memory cells, a sense amplifier and a discharging current regulator, wherein the plurality of virtual memory cells are independently provided with a plurality of discharging endpoints to carry out discharging on a virtual bit line, and the sense amplifier starts a signal on the bit line according to a signal on the virtual bit line to carry out a sense amplification operation so as to generate read data. The discharging current regulator regulates discharge current on at least one controllable discharging endpoint on the basis of operation voltage received by the memory cells.