The invention discloses a hybrid power tramcar speed adjusting method based on real-time power of a power system. The method comprises the steps that a tramcar energy consumption model is established,and an offline planned speed-time curve of a tramcar is solved; basic resistance parameters of the tramcar are identified, self-adaptive online adjustment is carried out, and an accurate speed powermodel of a tramcar system is established; the tramcar runs according to the offline planned speed-time curve, and the real-time maximum power of the whole power system is compared with the real-time power of the power system, so that the self-adaptive adjustment of the running speed of the tramcar is realized; and the path difference caused by the speed adjustment is taken as a coefficient, and the path difference caused by the speed adjustment is eliminated through speed closed loop feedback. The hybrid power tramcar speed adjusting method automatically adjusts the running speed of the tramcar according to the real-time maximum power of the power system, and provides a speed-time curve with online tracking and self-adaptive adjustment for an automatic train driving system; and the power performance is exerted to the maximum extent, and safe, reliable, punctual running of a vehicle can be ensured.