Lift door knife device integrating function of car door lock

The invention discloses a lift door knife device integrating the function of a car door lock. The lift door knife device comprises a door knife plate component, a first blade component, a second blade component, a spring and an emergency unlocking component, wherein the door knife plate component is rotationally connected with a car door lock component, a first drive plate component, a second drive plate component and a third drive plate component, and the bottom of the third drive plate component is matched with a flange outside the bottom of the car door lock component; the upper and lower parts of the first blade component are respectively in rotation connection with the third drive plate component and the first drive plate component; the top of the first blade component is also provided with a collision wheel component; the upper and lower parts of the second blade component are respectively in rotation connection with the car door lock component and the second drive plate component; one end of the spring is connected with the door knife plate component, and the other end of the spring is connected with the back of the first blade component. The lift door knife device integrating the function of the car door lock provided by the invention has a simple structure, is good in stability, and high in safety and reliability.