The invention provides a multifunctional heavy ammonium nitrate fuel oil explosive mixed loading truck which comprises a double-spiral feed system, a plurality of storage bins and a plurality of pipelines; an emulsion matrix, porous granulated ammonium nitrate and a physical density modifier are stored in a main storage bin; a diesel tank, a sensitizing solution tank and a cleaning water tank are designed in an auxiliary material bin; and the technical effect of mixed loading of various blasting explosives can be realized through different combinations of different raw materials in different storage bins, output pipelines and baffle plates. According to the invention, the multifunctional heavy ammonium nitrate fuel oil explosive mixed loading truck has multiple functions and wide applicability, can be used for producing the heavy ammonium nitrate fuel oil explosive, heavy ammonium nitrate fuel oil explosive with adjustable density, porous granulated ammonium nitrate fuel oil explosive, porous granulated ammonium nitrate fuel oil explosive with an adjustable density, heavy emulsion explosive with adjustable density, emulsion explosive with adjustable density, and long-distance delivery emulsion explosive, and meet the requirements of various blasting working environments and different varieties of explosives in one blast hole.