揭示了低温流体~3He的热导率在液态区随温度和压力两个状态参数变化的反常规律。综合该反常规律以及热导率在临界点附近的突变特性,首次提出了~3He在0.003 K至临界温度3.3157 K温区内完整的饱和线热导率方程以及压力高至20 MPa的压缩液相区热导率方程。方程计算值与实验数据相对偏差小于±1.5%,与高精度实验数据偏差小于±0.4%,并且在极低温条件下光滑过渡为由量子理论预测的理论极限. The anomalous laws of the thermal conductivity of cryogenic fluid ~ 3He in the liquid zone with temperature and pressure are revealed. Based on the anomaly law and the abrupt change of thermal conductivity near the critical point, the complete saturated linear thermal conductivity equation of ~ 3He in the temperature range from 0.003 K to the critical temperature 3.3157 K is proposed for the first time, and the compressed liquid phase up to 20 MPa Area thermal conductivity equation. The calculated deviation from the experimental data is less than ± 1.5%, and the deviation from the high-precision experimental data is less than ± 0.4%. And the theoretical transition from quantum theory to the theoretical limit of smooth transition at very low temperature is obtained.