The invention relates to the technical field of automobile engine control, and particularly to an automobile deceleration fuel cutoff control method which comprises the following steps: acquiring engine operation parameters in real time; judging whether the current working condition meets the deceleration fuel cutoff condition or not according to the current engine operation parameters; if yes, calculating the target torque according to the target torque formula, and further calculating the torque coordination coefficient according to the target torque and the torque coordination coefficient formula; performing distribution on the ignition efficiency coordination coefficient and the oil injection state coordination coefficient according to the torque coordination coefficient and the coefficient distribution formula; executing the deceleration fuel cutoff action according to the torque coordination coefficient to enable the engine to be in a fuel cutoff state. Through the automobile deceleration fuel cutoff control method, smooth transition of the engine torque in the fuel cutoff process is realized.