Extrusion injection-type building mortar, and preparation method and use method thereof

The invention provides extrusion injection-type building mortar, and a preparation method and use method thereof. The extrusion injection-type building mortar consists of a component A and a componentB; the component A comprises cement, epoxy resin and an aqueous toughening and modifying diluent, and contains or does not contain sand; the component B comprises an aqueous epoxy curing agent, sand,an aqueous toughening and modifying diluent and water, and contains or does not contain at least one selected from an accelerant, fly ash and silica fume; and the mass ratio of the component A to thecomponent B is 3:1 or the volume ratio of the component A to the component B is 2:1. The extrusion injection-type building mortar is mainly used for masonry, and extrusion injection is a main construction form. The mortar can be stably contained in a container or a sealed packaging bag for a long time, and when in use, the mortar is mixed and extruded by a special mixing device and poured into mortises of porous building b