OBJECTIVE：To study the analgesic effects of 4 sources of Curcumae Radix decoction pieces （Curcuma wenyujin ， C. kwangsiensis ，C. phaeocaulis and C. longa ），and compare the contents of curcumenol in their water extracts. METHODS ： Using aspirin as positive control ，acetic acid writhing method was used to investigate the effects of 4 sources of Curcumae Radix decoction pieces water extract on writhing latency and times of writhing in mice. The moisture contents of 4 sources of Curcumae Radix decoction pieces （10 batches of each source ，the same below ）were determined according to the drying method in 2015 edition of Chinese Pharmacopoeia （part Ⅳ）. The yield of water extract in 4 sources of Curcumae Radix decoction pieces were investigated by hot dipping method ，the contents of curcumenol in water extract of 4 sources of Curcumae Radix decoction pieces were determined by HPLC ，and comparison was conducted. RESULTS ：Compared with model group ，aspirin and water extracts of 4 sources of Curcumae Radix decoction pieces could significantly prolong the writhing latency of model mice ，and the water extracts of C. wenyujin and C. phaeocaulis could significantly reduce the writhing times of model mice （P＜0.05 or P＜0.01）. For C. wenyujin ，C. kwangsiensis ，C. phaeocaulis and C. longa ，the contents of moisture were 7.39％-8.80％，7.88％-9.88％，7.66％- 10.5468/ogs.2019.62.6.382 9.86％ and 7.68％-10.20％；the average yield of water extract were 46.30％，60.40％，38.65％，42.99％；the average contents of curcumenol in water extract were 0.271，0.066，0.310，0.058 mg/g. Except for a few batches ，the higher the yield of water extract，the higher the content of curcuminol in the same source of Curcumae Radix decoction pieces. CONCLUSIONS ：Four sources of Curcumae Radix decoction pieces have analgesic effect. The contents of curcumenol in C. wenyujin and C. phaeocaulis were similar ，and the contents of curcumenol in C. kwangsiensis and C. longa about 1/5 of that in C. phaeocaulis and C. wenyujin .