The application relates to the technical field of sound insulation and shock absorption floor materials, and discloses a foamed modified
polyurethane mortar composition, a foamed modified
polyurethane mortar, a preparation method of the foamed modified
polyurethane mortar and a method for preparing a sound insulation and shock absorption floor
coating. The foamed modified polyurethane mortar composition contains combination A, combination B and combination C, the
mass ratio of the combination A, the combination B and the combination C is 1:0.25-1.25, the
mass ratio of the combination A and the combination B is 0.6-1.8:1, the combination A contains polyhydric
alcohol, water, a foam stabilizer and additive E, the combination B is a polyisocyanate with an average NCO functionality of greater than or equal to 2, and the combination C contains a hydraulic binder, aggregate and additive F. The polyurethane mortar composition can form a microporous polyurethane mortar floor
coating, and the floor
coating has the advantages of fast curing speed, high strength, no
cracking, good sound insulation and high shock
absorption efficiency.