The deyjce construction and working principle of Calvet type heat conductive microcalorimetry are generally ineroduced in this paper. Based on previous work, we design a reactor vessel and its electrical calibration equipment according to our special study systems. The heat constant of our improved microalorimetry is gotten by means of electrical calibration on the basis of Tian's equation. The results gotten by in tegration method are identical with ones gotten by peak method. It shows that our improved device works well enough to develop further studies.``