Autoclaved aerated concrete block (AACB) is a new kind of green, environmental protection and economical wall material. Its production process can absorb a large amount of industrial waste residue, and the ratio of raw materials can reach more than 70%. However, in the actual construction situation, crack problems such as wall cracking and plaster layer falling off, as well as quality problems such as insufficient strength and easy cracking occur from time to time in the masonry which using AACB. In this paper, the common faults and causes of AACB masonry are summarized and analyzed, moreover, the related prevention and solving measures are put forward for reference in the masonry engineering. This paper can provide reference for the construction specification and quality acceptance of masonry engineering.