The invention provides a geographical location information estimation method. The geographical location information estimation method comprises the following steps of step s01, determining a reference starting point: moment t0, geographical location information (x0,y0,z0), speed (vx0,vy0,vz0) and accelerated speed (ax0,ay0,az0); step s02, obtaining accelerated speed (axj,ayj, azj) at the moment tj=t0+j*dt; step s03, calculating the speed (vxj,vyj,vzj) at the moment tj=t0+j*dt; step s04, estimating the displacement (sxj,syj,szj) in the time period from the t[j-1] to tj; and step s05, estimating the geographical location information at the moment the tj: xj=x[j-1]+sxj, yj=y[j-1]+syj, and zj=z[j-1]+szj. The geographical location information estimation method provided by the invention is capable of estimating geographical location information under the condition that GPS, BeiDou and mobile communication signals are lost.