Collision emergency cut-off system of electric automobile

The utility model relates to a device for managing and controlling an electric automobile power supply, in particular to a collision emergency cut-off system of an electric automobile. The collision emergency cut-off system of the electric automobile comprises a controller, a collision sensor, a contact adhesion detecting device and a cutter, wherein the contact adhesion detecting device is used for detecting the contact adhesion state between a main positive contact and a main negative contact under the control of the controller, and the cutter is connected with the control signal output end of the controller and used for cutting off a current transmission terminal in a manual service switch under the control of the controller. By means of the technical scheme, when the contact of the main positive contact is adhered to the contact of the main negative contact in the vehicle collision, a main loop is completely cut off through the cutter, and accordingly the fire or electric shock due to vehicle electrificat