The invention relates to physical technical killing of post-production pathogenic bacteria for crops, in particular to a heating plate system for studying thermal death dynamics of microorganisms, which is important basis for establishing a reliable microorganism thermal death basic thermodynamics model. This system comprises an upper aluminum heating plate, a lower aluminum heating plate, a heating sheet, six drawing boxes, six sample units, a PID (proportion integration differentiation) temperature controller, data control and acquisition software and a computer. The PID temperature controller is connected with heating plate systems respectively through power cords and is connected with the computer through a serial port, the PID temperature controller is connected with a sample and the heating plates through T-shaped thermocouples and can precisely control heating parameters such as target temperature, heating rate and temperature-holding time, for the sample. The heating plate system is simple in structure, convenient to operate and safe and reliable, can precisely control the heating parameters in a testing process, improving testing efficiency, can provide theoretical basis for establishing industrial post-production sterilization technology of crops, and has high scientific research value.