The methods for reconstructing the sea surface paleotemperature have attracted many scientists attention particularly in recent years and become more and more perfect.

TEX86 index is a relatively new paleo-sea surface temperature(SST) proxy,based on the ratio of a newly discovered group of biomarkers,glycerol dialkyl glycerol tetraethers(GDGTs),which are produced by marine archaea Crenarchaeota.

The palaeotemperature evolution of Bayindulan depresion has been recovered with the method of vitrinite reflectance.

2℃/100m between Tertiary and Quaternary period because of the continuous uplift erosion and the decrease of the Terrestrial heat flow, which made the palaeotemperature begin to decrease at early Tertiary.

Studying the palaeogeotherm of Dongying Sag by using vitrinite reflectance;

This paper restores the palaeogeotherm and palaeogeothermal gradient in Songliao Basin using several methods.

There were two relatively high palaeogeothermal stages,one in Cambrian-Early Ordovician and the other in Carboniferous-Permian.

Fluid inclusion microthermometry and apatite fission track analysis were used to reconstruct the Tertiary paleotemperature of the East depression,Liaohe basin.

The present temperature has been studied with testing data and the paleotemperature has been restored with fission track in apatite and fluid inclusion in Damingtun sag.

Based on the experiment, this research calculates kinetic parameters of kerogen vitrinite reflectance (R_o) through KINETICS software, and then calculates Cambrian-Ordovician paleotemperature of the well Tacan 1 combined with burial history.