hrough the orthogonal experiment to determine the optimal synthetic conditions：m(MA):m(AMPS):m(AM)=21:9:8，The amount of initiator is 8%、reaction temperature is 90 ℃ and reaction time is 6h,Under these conditions,synthesis a new type of high temperature oil well cement retarder HJH-1and evaluate its application performance.The experimental results show that the HJH-1 retarder in the high temperature of 140 ℃ environment still has a good retarding effect,when the added amount of retarder is 4% that thickening time is 300min,Initial consistency under 30 Bc, the curved shape of thickening is normal, right angle thickening time is less than 20 min,Adjustability of thickening time is good,and have a low sensitivity of temperature or add quality,which all meet the cementing construction safety requirements;in addition, the low field nuclear magnetic resonance (NMR) analysis technology was applied to the plastic cement slurry to test slurry transverse relaxation time T2 distribution before initial setting,Furthermore it analyzes the state of water in the initial stage of hydration and validate the retarder on the influence of cement hydration process in the initial stage.