Using sodium bentonite as raw material, N-isopropyl acrylamide (NIPAM) is grafted on the surface of sodium bentonite through the dehydration condensation of silane coupling agent KH570 to prepare intelligent temperature-sensitive bentonite (NIPAM-B). The single-factor method was used to optimize the synthesis index of NIPAM-B, and XRD and FTIR technology were used to characterize NIPAM-B. At the same time, the temperature sensitivity of NIPAM-B and the rheology and suspension of NIPAM-B suspension were investigated. , And introduce acrylic acid (AA) monomer to realize temperature control. The results show that NIPAM-B has good temperature-sensitive characteristics, and the rheological properties of the intelligent temperature-sensitive bentonite suspension show steady flow characteristics and heating and thickening characteristics in the range of 40-60℃. However, the suspensibility of this smart temperature-sensitive bentonite is slightly lower than that of the original bentonite. In addition, after introducing the temperature control effect of AA, it is found that for every 10% increase in the ratio of the added amount of AA to NIPAM, the LCST of the smart temperature-sensitive bentonite will increase by about 10°C.