The invention discloses a gasoline engine knock control method. The control method comprises the rotating speed collecting step of collecting the rotating speed of the engine working condition, the opening collecting step of collecting the charging efficiency, the starting judging step of judging whether the starting condition of engine shock self-adaptation control, and the engine knock self-adaptation control execution step of obtaining the preset deferred ignition angle according to the current engine total working condition rotating speed and the charging efficiency and stacking the deferred ignition angle to the corresponding ignition angle output. On the basis of optimization of an ECU software control strategy, inhibition of combustion noise caused by air snatch of certain air cylinders on some extreme operation working conditions is achieved in the asymmetric intake manifold design mode.