The invention discloses a foaming agent composition and polyurethane hard foam. The foaming agent composition is prepared from 12.5-13.5 parts by mass of cyclopentane and 2-3 parts by mass of LBA. Compared with the prior art, the formula of the foaming agent is improved, LBA is added on the basis of cyclopentane, on the basis of guaranteeing that the performance of heat insulation foam of a refrigerator is improved, the density and heat conducting coefficient of the heat insulation foam are reduced, the cost of refrigerator foaming is reduced effectively, the performance of the foam is effectively improved, and then the energy consumption of the refrigerator is effectively reduced.