The invention relates to an earthquake-proof processing method for a liquefiable sandy soil foundation. The method adopts the technical proposal that: the technological flow of the method for integrating dynamic vibration and static loading is as follows: the dynamic vibration method is utilized to perform construction on a reinforced vertical displacement hull on the liquefiable sandy soil foundation and the static method is utilized to perform loading and prepressing. Firstly, a sand cushion is laid on the surface of the liquefiable sandy soil foundation to be as an external drainage channel of the vertical displacement hull for drainage; secondly, the type and the distribution of the reinforced vertical displacement hull are worked out, and the diameter and the space of a sleeve of the reinforced vertical displacement hull and the diameter of a sand well are determined; thirdly, the reinforced vertical displacement hull is drilled into the liquefiable sandy soil foundation; fourthly, the static method is utilized to perform loading and prepressing; and finally, loading and prepressing raw materials can adopt materials such as sand, stones, soil and so on, and the loading height depends on factors such as the properties of liquefiable sandy soil, the engineering properties, the engineering earthquake resistant design requirements and so on. The method has the advantages that: the earthquake resistance of the liquefiable sandy soil foundation is improved; the environmental pollution is reduced; and the construction cost is lower.