Abstract: Pyrolysis kinetics of biogas residues were researched by FWO,Friedman and KAS methods,and its thermodynamic parameters including pre-exponential factor,enthalpy change,Gibbs free energy and entropy change,were also calculated. In addition,effects of the temperature on pyrolysis products distribution and properties were studied in a fixed-bed reactor with traditional electric heating. The pyrolysis process can be divided into three weightlessness stages,of which the second stage is the main weightlessness stage. The average activation energies calculated by Flynn-Wall-Ozawa（FWO）method,Friedman method and Kissinger-AkahiraSunose（KAS）method is 410.00 kJ/mol,471.32 kJ/mol and 420.01 kJ/mol,respectively,Thermodynamic parameter calculation results show that the pyrolysis process of biogas slag has stable energy output. The yield of liquid product increased first and then decreases with the increase of temperature. The high calorific value（HHV）of the gas products increases from 6.82 MJ/Nm3at 400 ℃ to 8.54 MJ/Nm3at700 ℃. FTIR and Raman spectra show that the order of biochar structure increases with raising of pyrolysis temperature.