To study the eccentric compression performance of autoclaved flyashlime brick masonry, and validate the applicability of current code’s calculation method, static tests on 36 eccentrically loaded puncheons of standard autoclaved flyashlime solid brick and KP1 type perforated brick with circular holes masonry are carried out by applying eccentric load on the top of the specimens. The bearing capacity of eccentric compression is analyzed using planesection assumption and ideal stress/strain curve. The features and shapes during the process of failure are obtained and the eccentric compression impact factor formula is also obtained by regression analysis of experimental data. With eccentricity increasing, cracking load and failure load are gradually decreased, and the failure features gradually change into large eccentric compression from axial compression. Most test values of bearing capacity under eccentric compression are higher than code calculating values. The average strain distribution in the section is in accordance with the planesection assumption. The theoretical analysis method used is feasible, current code’s formula can be used to calculate the bearing capacity of flyashlime brick masonry under eccentric compression.