Abstract: The consolidation coefficient was an important parameter in geotechnical engineering.To improve the precision of consolidation coefficient,many solutions have been suggested,such as logarithm of time and square root of time methods.However,many solution depends on the initial value of compression curve which and influenced the precision of consolidation coefficient directly.At the same time,only few data were adopted to determine the consolidation coefficient and couldn’t reflect the complete process of conslidation.So,in the paper,the least square method was adopted to compute the consolidation coefficient with the derived formulae.At the same time,the obtained solution could eliminate personal error and get the initial and final values of conslidation.