The invention belongs to the technical field of temperature control, and especially relates to a rapid temperature control system for wire-mesh reactors. The system is characterized in that the controlled object of the system is a wire-mesh reactor of which the temperature is collected by a thermocouple, the output signal of the thermocouple is voltage-transformed by a temperature transmitter and then transmitted to a core control unit, the core control unit calculates out the control quantity and inputs the control quantity to a power regulator, and the power regulator outputs the control quantity to a single-phase isolation transmitter to control the power actually added to the two ends of the wire-mesh reactor, thus forming closed-loop control of the temperature of the wire-mesh reactor; and principle computer monitoring software communicates with the core control unit through connection via a serial port and inputs a human instruction and parameters to the core control unit, and the core control unit refreshes and displays the current temperature value of the thermocouple on a display screen. The defect that there is a need to specially design a test bench-specific DC power regulator in the traditional method is overcome, and the limitation that there are only a few fixed choices for the heating rate of the traditional test bench is overcome.