The utility model provides a temperature-adjustable infusion heater without radiation. An LED display screen, a temperature adjusting key and a power key are arranged on an upper box, and a temperature and electricity control circuit board is arranged in the upper box. An S-shaped groove, a carbon fiber heating wire, a pad, a temperature sensor and a thermistor are arranged in a lower box, an oblique inlet pipe opening and an oblique outlet pipe opening are formed in the two side walls of the lower box respectively, a rechargeable battery is arranged at the bottom of the lower box, a USB charge port is formed in the outer side face of the lower box, and the carbon fiber heating wire, the thermistor, the temperature sensor, the chargeable battery and the USB charge port are electrically connected with the temperature and electricity control circuit board through flat cables. The temperature-adjustable infusion heater generates far infrared rays which are beneficial to the body health instead of radiation, facilitates recovery of patients, and is high in heating efficiency, high in speed, convenient to carry and use, capable of being charged, adjustable in temperature, and safe in use.