The working temperature of the mechanical parts can reflect the important information such as lubrication and load of the parts.According to the problem that the existing temperature monitoring system could not be used in key parts such as bearings and motors, the application of multichannel temperature acquisition system in the existing lubrication system was present. The temperature signal was collected and converted into voltage signal by using PT100, then it was amplified by the amplifier and then transmitted to the single chip microcomputer. And multi switch was used to achieve the temperature circuit detection and display of a number of monitoring points. It provides information for lubrication system to determine the performance of the lubrication pump.