The invention relates to an elevator brake control device, in particular to a power supply disconnect device of an elevator brake. The brake comprises an input loop, an alternating current or direct current conversion module, a DC/DC power conversion unit, a logic control module, a solid-state switch, and a follow current element module, wherein the logic control module is connected with an elevator control relay, and a logic control instruction is generated according to the connectivity and a connection or disconnection states of the elevator control relay; the solid-state switch is connectedto the signal output end of the logic control module and receives a control instruction sent by the logic control module, the output voltage is controlled according to the instruction sent by the logic control module, and the voltage is output by a voltage output end; and the follow current element module is connected with the voltage output end and the output loop of the solid-state switch. According to the device, no spark which is generated when the power supply of the brake is disconnected is realized; and meanwhile, counter electromotive force generated by a coil can be absorbed when thecurrent of the coil of the brake is connected or disconnected, so that reliable braking of the elevator brake is guaranteed, moreover, safety of a short-circuiting device is guaranteed, and no delayrelease of the brake is guaranteed.