At present, the exploratory development of green building goods with high content of fly ash is an important research topic in which fly ash is used comprehensively. High content of fly ash means that the quantity of blended fly ash is not lower than 50 percent of the weight of bricks. The technique of solidifying fly ash invented by us will make the quantity of fly ash amount to 85 percent of the weight of bricks whose compressive strength exceeds 10 Mpa. In this paper, the factors affecting frost resistance and compressive strength of the fly ash brick are discussed. The technique is a new means, which utilizes fly ash effectively and exhibits notable economic, social and environmental results.