Storage array output current reading method and system supporting negative excitation

The invention discloses a storage array output current reading method and system supporting negative excitation. The system comprises a complement coding module, a control module, a current reverse module, an accumulation module, an activation module, a pooling module and an analog-to-digital conversion module. Excitation is input bit by bit in a binary complement form, and output current is converted into voltage through the current reversing module and the accumulation module and then is read out through the activation module, the pooling module and the digital-to-analog conversion module. Negative value excitation can be effectively expressed by applying complement coding, and the problem that the inference precision of the neural network is low due to the fact that the negative value excitation is thrown out is solved; and the current reverse module is enabled when sign bit current is read out, binary complement to decimal conversion is achieved in cooperation with a coding mode, accumulation of output cu