The invention relates to an extreme value searching control parameter self-adaptive adjusting method based on a slip form. The method includes the following steps: (1) collecting actual output power ps(t) of t moment (current moment) from the output end of a generator every sampling period delta t and obtaining current wind speed through a wind speed measuring device; (2) leading out optimum rotating speed under the current wind speed; (3) calculating an adjusting coefficient gama; (4) conducting parameter adjustment on extreme value searching control based on the slip form, if |ps(t)-pwmax(t)|>Xi and Xi is a threshold, Z0=Z0*gama, and U0=U0*gama; otherwise, keeping Z0 and U0 unchanged, t=t+delta t and turning to the step (2); (5) utilizing a control system to quickly adjust the rotating speed omega r of the generator to reach the optimum rotating speed omega r ef; (6) enabling an output power curve to approach the optimum power curve. By means of the method, parameters of the control system can be adjusted automatically according to the current wind speed environment, the output power curve can approach the optimum curve, and the wind energy utilization coefficient Cp can be recovered to the maximum value.