An oil-based concentrate, its preparation method and use method are disclosed. The oil-based concentrate includes the following components: component A: at least one active Spirulina substance in solid state at ambient temperature; Component B: at least one active substance of piroxifen in solid state at ambient temperature; component C: fatty acid ester of at least one total formula r1-coo-r2 and / or r1-coo-r2-ooc-r1; component D: at least one non-ionic surfactant and / or at least one nitrogen surface active substance; and optionalComponent e: one or two additives selected from an emulsion, an anti foam agent, a preservative, a preservative, an antioxidant, a dye or an inert filler material; in the molecular state of component C, pyridine alcohol is dissolved, while in the particle state of component C, the propeller is partially suspended. The oil-based concentrate manufactured by the invention can effectively solve the problem of increasing propeller particles during storage, improve the stability of the prepared state, and increase the cumulative effect and bioavailability.Se revelan un concentrado a base de aceite, un método de preparación del mismo y el uso del mismo, el concentrado a base de aceite comprende los siguientes componentes: un componente A: por lo menos una sustancia activa de espirotetramato que es sólido a temperatura ambiente; un componente B: por lo menos una sustancia activa de piriproxifeno que es sólido a temperatura ambiente; un componente C: por lo menos un éster de ácido graso con la fórmula general R1-COO-R2 y/o R1-COO-R2-OOC-R1; un componente D: por lo menos un tensioactivo no iónico y/o por lo menos un tensioactivo aniónico; y, de manera opcional, un componente E: uno o por lo menos dos aditivos seleccionados de un emulsionante, un agente antiespumante, un conservante, un antioxidante, un colorante o un material de relleno inerte; en el que el piriproxifeno se disuelve en un estado molecular en el componente C, y el espirotetramato