This article conducted thermodynamic performance measurements of T800H resin based composite materials.The thermal expansion coefficient of composite materials was measured using a thermal expansion analyzer within the temper-ature range of 0 ℃ to 170 ℃;The constant temperature and dynamic DSC scanning were performed on E1806 resin,and the curing kinetics equation of E1806 resin was established based on an autocatalytic model;The gel curing degree of E1806 resin was 0.62 measured by rotary rheometer;The shrinkage strain in the thickness direction of unidirectional laminates af-ter gel is 0.88%measured by TMA method.