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Double self-adaptive fuzzy PID algorithm-based control strategy was proposed to construct quasi-cascade control system to control the speed of the acid-pickling process of titanium plates and strips.It is very useful in overcoming non-linear dynamic behavior,uncertain and time-varying parameters,un-modeled dynamics,and couples between the automatic turbulence control (ATC) and the automatic acid temperature control (AATC) with varying parameters during the operation process.The quasi-cascade control system of inner and outer loop self-adaptive fuzzy PID controller was built,which could effectively control the pickling speed of plates and strips.The simulated results and real application indicate that the plates and strips acid pickling speed control system has good performances of adaptively tracking the parameter variations and anti-disturbances,which ensures the match of acid picklingtemperature and turbulence of flowing with acid pickling speed,improving the surface quality of plates and strips acid pickling,and energy efficiency.