Abstract: The mechanical properties of masonry mortar is one of the key factors affecting the structural performance of ancient masonry towers.In order to study the main factors affecting the mechanical properties of sticky rice-lime mortar and improve the mechanical properties of materials,the sticky rice concentration,water-lime ratio,lime-loess ratio and the content of admixtures were used as experimental variables to design the mortar mix ratio and make sticky rice-lime mortar test blocks for axis Compression test.The failure phenomena of 4 types of mortar test blocks was observed,and the stress-strain curves was obtained,the compressive strength and elastic modulus of various mortar test blocks was compared,and the main factors affecting the strength of glutinous rice mortar was analyzed.The results are as follows.The rice slurry concentration and water-lime ratio are the main factors that affect the mechanical properties of the mortar.When the rice slurry concentration is 5% and the water-cement ratio is 0.8,the mechanical properties of the glutinous rice mortar block are the best.When the sticky rice solution concentration is 7%,water-lime ratio is 0.7 and the lime-loess ratio is 3∶ 7,the mechanical properties of the sticky rice-lime mortar block’s mechanical properties are the best.alum and titanium dioxide greatly improve the compressive strength and shrinkage of the sticky rice-lime mortar,and the addition of 1.0% alum increases the compressive strength 1.26 times,adding 2.0% alum can increase its elastic modulus by 3.60 times.