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The hollow pint-sized concrete block is a kind of new energy-saving material for wall. In the popularization process umder difference in temperature, the crack of the concrete small hollow bloc is the general problems. Masonry wall temperature load calculation, mainly is the temperature difference fromula. In the calculation of masonry structure, not only should consider experience for a short time, temperature variation of temperature changes, consider the long-term effects in temperature changing. In these two kinds of temperature, under the common function of each wall generates its own temperature can cause structure deformation, at the same time because temperature change inconsistencies, roofing and wall body produces the relative temperature and deformation of the structure, and caused each piece of mutually constrained wall structure deformation will also play a role. Some control measures were put forward. These researches provided theory basis for the wide use of the new energy-saving materials.