Background:Liquid lead-bismuth eutectic(LBE) is important spallation target materials and candidate coolant materials in accelerator driven subcritical(ADS)system.Purpose:Its thermodynamic physical properties are keys to understand the basic problems in ADS R&D.Methods:By the calculation of scientific laws as well as fitting other scholars’ experimental results

we tried to obtain the above thermodynamics physical properties.Results:By the calculation

we got formula about characteristic temperatures

density

specific heat

viscosity and thermal conductivity of liquid lead-bismuth alloy.And by fitting other scholars’ experimental results

we got the fitting formula.Conclusions:Finally

by the contrast analysis

we found that the fitting formula and calculation formula agree well

and fitting formula more approaches the experimental value with a high accuracy whose differential deviation is not over 1%.