The invention relates to a control method of a load self-adaptive accelerator system. The defects in the prior art are overcome. According to the technical scheme, the control method is suitable for an electric vehicle or a hybrid vehicle, and is characterized in that an accelerator opening degree contrast table and/or an accelerator opening degree contrast formula is established for the total weight of a vehicle, and the current total weight of the vehicle is obtained, the current response modification value is obtained by inquiring the accelerator opening degree contrast table and/or the accelerator opening degree contrast formula according to the current total weight of the vehicle, and accelerator response is set according to the actual opening degree of an accelerator and the response modification value. Current offset vectors are decomposed with the vehicle transverse axis as the X axis and the vehicle longitudinal axis as the Y axis, the tire power distribution ratio of each tire is modified according to the decomposition value of the current offset vectors, each tire of the vehicle outputs power in the form of standard electricity according to the power distribution ratio, the power is multiplied by the response modification value to obtain a product, the product as the final vehicle electricity output power is output, and the second step is executed again.