Aim\ To research the rule about the finite element method of 2 D thermal field and the skill of programm design. Methods\ According to the theoretical analysis and the practical calculation
the regular pattern and the skill is verified. Results\ The number of elements
element points and the shape of elements have a strong effect on the accuracy of 2 D thermal field calculation
the skill of programm design will affect whether the calculation could be successful. Conclusion\ Stick to the rule of 2 D finite element method and seek for the skill of programm design will help to finish the calculation of 2 D thermal field rapidly and accurately.