The effect of a new kind of amphoteric carboxylic acid-based graft copolymer concrete superplasticizer(SSP for short) on thermology of hydration and electrical resistivity was investigated by means of non-contacting electrical resistivity measurement device and calorimetric device.According to experimental results,the SSP does not retard cement hydration,but ture can reduce the rate of heat evolution,the heat amount of early hydration of cement paste,and delay the time to reach highest hydration temperature.The SSP at a dosage of 0.3% reduces the heat amount of 1 d hydration by 83%,delays the time to reach highest hydration temperature about 20 h,and reduces the rate of heat evolution by about 50% compared with reference cement paste.The electrical resistivity results also indicate that the electrical resistivity increases with increase of the SSP dosages and the induction period is greatly delayed.