The invention relates to the field of motor vehicle parts, and in particular relates to a motor vehicle door lock. The motor vehicle door lock comprises a locking device and an actuating mechanism, wherein the locking device comprises a shell, a rotary clamping plate, a locking pawl and a rotating shaft; the locking pawl is hinged with the shell; the rotary clamping plate is hinged with the shell through the rotating shaft; the motor vehicle door lock further comprises a follow-up device; one end of the follow-up device is hinged with the rotary clamping plate through a joint or the follow-up device and the rotary clamping plate are integrated; and the other end of the follow-up device is connected with the actuating mechanism. By changing the structure of the rotary clamping plate, the connection between the follow-up device and the rotary clamping plate is designed, the quantity of sensors in the locking device is reduced, a connecting rod mechanism in the prior art is saved, a motion path is shortened, the cost is saved, the door lock fault probability is reduced, and three states of the door lock, namely an unlocking state, a semi-locking state and a totally locked state, can be judged by one sensor. Moreover, the mounting position of the sensor can be placed in a space outside the locking device along with extension of the follow-up device, and thus the volume of the locking device is greatly reduced.