The pyrolysis characteristics and pyrolysis mechanism of waste epoxy resin circuit boards containing a small amount of copper foil are mostly studied by a single "model matching method". To illustrate its pyrolysis catalysis, the pyrolysis characteristics and pyrolysis mechanism of the screened samples were analyzed by synchronous thermal analyzer and gas chromatography-mass spectrometry (GC-MS) at four different heating rates (5, 10, 15, 20℃/min), proposed a method to accurately calculate the "kinetic triplet". That is, firstly, two equal conversion methods were compared and analyzed to determine whether to follow a single pyrolysis reaction. Secondly, ?atava-?esták method and master curve method were used to select the appropriate mechanism model. Finally, the exact dynamic reaction order and mechanism function were obtained. The results showed that with the increase of heating rate, the residual residue in pyrolysis of waste circuit boards increased, indicating that the smaller the heating rate, the more complete the pyrolysis and the maximum rate of pyrolysis increased with the increase of heating rate. The pyrolysis process can be divided into four stages: the first stage (<150℃), evaporation of residual water on the surface or dissipation of other small molecules, the second stage (150~380℃), the third stage (380~500℃), the epoxy resin continued to decompose tetrabromobisphenol A, which formed small molecules and volatilized, and the fourth stage (>500℃), the pyrolysis residue decomposed slowly. Kissinger, Flynn-Wall-Ozawa and Friedman methods were used to solve the kinetic parameters of the thermal decomposition reaction of the sample, and finally the pre-exponential factor was 1.14×1022 min-1 and the activation energy was 218.533 kJ/mol. The mechanism function was compared and analyzed by ?atava-?esták method and master curve method, and finally the complete kinetic three factors were obtained. In addition, the relationship between activation energy and conversion rate proved that the waste epoxy resin circuit board can be modeled by Avrami-Erofeev equation (random nucleation and growth model) with reaction order of 5.4131: G(α)=[-ln(1-α)]5.4131.