The invention relates to a self-learning method and system for a half engagement point of an automobile wet dual clutch. The self-learning method comprises the following steps that when the self-learning condition of the half engagement point of the automobile wet dual clutch is met, the automobile wet dual clutch is controlled to be disengaged, and a friction pair of a synchronizer is enabled to be in the half engagement state; the initial pressure value of the automobile wet dual clutch in a transmission controller is obtained, and the actual pressure of the automobile wet dual clutch is controlled according to the initial pressure value; if the rotational speed difference of the friction pair of the synchronizer is lower than the first threshold value, the actual pressure of the automobile wet dual clutch is gradually increased and controlled according to the set step length till the rotational speed difference of the friction pair of the synchronizer is higher than the second threshold value; the current pressure value of the automobile wet dual clutch is obtained, and the difference between the current pressure value and the initial pressure value is calculated, and is used as the self-learning deviation value of the half engagement point of the automobile wet dual clutch; and the pressure value of the half engagement point of the automobile wet dual clutch is determined according to the self-learning deviation value. According to the invention, the problem that when the half engagement point of the automobile wet dual clutch is changed, the automobile ride comfort is reduced can be solved.