The invention discloses a neutral-section passing pantograph-catenary protective method and device. The neutral-section passing pantograph-catenary protective device comprises an input module, a control module and an output module. The neutral-section passing pantograph-catenary protective method comprises the steps that the input module sends a neutral-section passing signal of a train arriving at a neutral section to the control module; the control module receives the neutral-section passing signal and then judges whether or not the train has two raising pantographs in two overlapping sections at the end of a neutral section at the same time, and if yes, a control signal for controlling the pantographs to drop is sent to the output module; the output module sends the control signal to one pantograph, and the pantograph is controlled to drop. Through the neutral-section passing pantograph-catenary protective method and device, the aim that when the train passes the neutral section in the pantograph raising running process, a pantograph-catenary is automatically protected and controlled is achieved.