The invention discloses a foam-like fracturing system, which comprises a base liquid, an acid liquid and a gel breaker, wherein a weight ratio of the base liquid to the acid liquid to the gel breaker is 10:0.8-1.5:0.002-0.006. The invention further discloses a foam-like fracturing liquid preparation method, which comprises the following steps: S1, preparing a cross-linking agent, S2, preparing a base liquid, and S3, preparing an acid liquid. The invention further discloses a foam-like fracturing liquid filling method. According to the present invention, functions similar to the conventional foam fracturing liquid are provided, heat and gas can be automatically generated under a stratum condition, integration of automatic gas generation, acid cross-linking and the foam-like structure is achieved, the structure viscosity is stable, sand carrying capacity of the fracturing liquid can further be enhanced, filtration loss resistance is strong, intrusion damage on the stratum can be effectively reduced, a water lock effect can be effectively reduced, the guar gum use amount and the fracturing liquid base liquid preparation difficulty are effectively reduced, and effects of excellent sand carrying, gel breaking, low damage and cleanup are provided.