Valve resistance adaptive control optimization method and system based on flow change

The invention discloses a valve resistance self-adaptive control optimization method based on flow change, and the method comprises the steps: detecting the flow velocity of fluid on a pipeline through a flow velocity detector, and enabling the flow velocity detector to be installed at the bottom end of a bent pipe section which is bent downwards; fluid is discharged from a horizontal branch pipe connected with one side of an outlet of the bent pipe section, and the flow velocity of the fluid is recorded only after the fluid is discharged from the horizontal branch pipe; the outlet end of the bent pipe section is connected with a horizontal water outlet pipe section, the water outlet pipe section is located above the horizontal branch pipe, and when fluid is discharged from the horizontal branch pipe, the horizontal branch pipe is closed immediately, so that the fluid flows into the water outlet pipe section; the horizontal water outlet pipe section is further connected with a resistance regulator, the resist