Every earthquake always cause serious destruction of engineering structure , and bring about disastrous heavy losses to society economy. In view of confusion phase of reinforcement philosophy and method in existing engineering structure now, the paper analyses wreck of existing engineering structure as a result of the earthquake, put forward “Degree of Monolithic Secure” thought and probe into its application in aseismic strengthening of existing engineering structure. The “Degree of Monolithic Secure” means using the human being’s thinking and judgment, deciding the fundamental question, conception, and principle of engineering structural reinforcement in macrocosm, on the basis of its essence characteristic and purpose request. The Strengthening philosophy emphasize fundamental of three-dimension conception, spatial function, receiving the strength rationally, coordinating the deformation. It expound basic conception of self-organize theory, whole pre-stressing Strengthening technology directed by Degree of Monolithic Secure.