用一种新的方法求算热分析动力学的三因子 :(1)用迭代的等转化率法求出较为可靠的 Ea;(2 )用多升温速率等温法判定出可能的机理函数 ,并在 Ea和的基础上计算出 A.用该法对一水草酸钙 (Ca C2 O4· H2 O)脱水反应的热分析动力学三因子进行研究 ,得出其对应的机理函数的方程为 ;f (a) =n(1-a) 1- 1/n;Ea为 82 .83 k J· mol- 1;A为 1.14 2× 10 5～ 1.2 3 5× 10 5s- 1 A new method is used to calculate the three factors of thermal analysis kinetics: (1) to obtain a more reliable Ea by the iterative equivalent conversion method; (2) to determine the possible mechanism functions by isothermal method with multiple heating rates and Calculated on the basis of Ea and A. According to the thermal kinetic three factors of the dehydration reaction of calcium oxalate monohydrate (Ca C2 O4 · H2 O) by this method, the equation of the corresponding mechanism function is obtained. F (a) = n (1-a) 1- 1 / n; Ea is 82.83 kJ · mol -1; A is 1.14 2 × 10 5 ~ 1.2 3 5 × 10 5s -1