There are three actions of different features exerted upon the work surface by the abrasive grains on the working surface of the wheel during grinding process: they are elastic scratching, plastic pressing and cutting. The heat transformed by these three actions as well as the rubbing between the wheel bond and the work surface contributes to the integrated average temperature on the contact zone between the wheel and the work. In this paper the measurement and calculation of this integrated average temperature and the temperature distribution in the work are given, the influences of various grinding parameters are also studied.