The invention discloses a biological impedance imaging device. The biological impedance imaging device comprises a single-chip microcomputer (1), an upper computer (2), a DDS signal source (3), an A / D conversion circuit (4), a low-pass filtering circuit (5), a voltage-current conversion circuit (6), a signal amplifying circuit (7), a phase-sensitive demodulation circuit (8), multi-way switches (9), a plurality of electrode sets (10) and a physical model (11). The biological impedance imaging device has the advantages that a generated current source has high output resistance, and therefore the independence between output current and load voltage can be guaranteed; each set of switches needs eight-digit IO ports for controlling, the control end of an analog switch is connected with a latch circuit, in this way, two sets of switches can be controlled through an 8+2 digital address line, the number of the IO ports for controlling the single-chip microcomputer is reduced, and then the circuit is simpler and optimized; besides, real part information and imaginary part information of impedance can be obtained through the phase-sensitive demodulation circuit, so that the impedance information obtained through the biological impedance imaging device is more accurate compared with a method for taking the real part information of the impedance only.