ObjectiveTo study the effect of PPH operation and TST operation in treating mixed hemorrhoids. Methods101 patients with mixed hemorrhoids in our hosp ital from 2011 January to 2013 December were enrolled and divided into observation group undergoing TST operation and control group undergoing PPH operation. The operation condition, anal function and quality of life were compared. Results(1) operation condition: in TST group, the operation time (23.1±5.2)min, blood loss volume(4.2±0.5)ml,bed time(1.2±0.3)d, hospitalization time (4.8±0.8)d were significantly lower than those of control group; (2) pain score: the first defecation time (1.5±0.3) d, 1 d, 2 d, 3 d anal pain score(3.8±0.4, 2.6±0.34, 1.9±0.3) of observation group were significantly lower than those of control group; (3) anal dynamics: anal resting pressure (23.6±6.4) mmHg of observation group was significantly higher than that of control group, re ctum tolerance (14.3±3.5) ml, rectal sensory threshold(2.2±0.5) ml of observation group were significantly lower than those of control group; (4) quality of life: material life, physical health，mental health, social dimension score （54.2±7.24, 65.3±7.2, 65.5±8.4, 61.5±7.8）of observation group were significantly higher than those of control group. ConclusionTST is an ideal therapeutic method in treating mixed hemorrhoids for it is helpful for reducing operation trauma, promoting postoperative recovery, and improving anal function and quality of life.

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