The invention discloses a data latching sense sensitive amplifier based on magnetic tunnel junctions. The amplifier comprises a primary circuit, a secondary circuit and a switching circuit, the primary circuit comprises two magnetic tunnel junctions and an output circuit, the secondary circuit comprises a latch circuit and a feedback circuit, after write operation is conducted by the magnetic tunnel junctions, a voltage difference is taken as the input of the output circuit, two signals with opposite amplitudes are output to the latch circuit by the output circuit, output signals of the wholesense sensitive amplifier are output by the latch circuit, the output of the latch circuit is received by the feedback circuit, a reading completion signal is generated, the reading completion signalis transmitted to an external control circuit, the power supply of the primary circuit is cut by the external control circuit according to the read completion signal to reduce power consumption, and after the power supply of the primary circuit is cut, signals of the primary circuit are latched by the secondary circuit. According to the amplifier, only one step of enabling is needed, precharge process does not exist, data over latching can be achieved, and the power consumption can be greatly reduced.