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The present application relates to the technical fields of hydraulic fracturing slug dosage design, in order to solve the problems of complex calculation process and long time in slug dosage design, the present application provides a kind of optimization design method of hydraulic fracturing slug dosage based on frog leap algorithm, according to the fitness function of constraint condition and optimization target, constraint condition includes slug dosage constraint condition;Optimization variable is continuously iterated and optimized according to the fitness function by using frog leap algorithm, and optimization variable includes the slug fracturing fluid dosage of each section, until the convergence condition is met, so as to search the global optimal solution in the feasible region of slug fracturing fluid dosage.It also provides a system for implementing the method of the present application, including feasible region setting module, optimization variable setting module, constraint condition setting module, fitness function setting module and optimal solution search module.The frog leap algorithm used in the present application is easy to program and realize, and the calculation speed is fast, the optimization ability is strong, and the efficiency of slug dosage optimization design is guaranteed.