This work designs a solar intelligent voice broadcast garbage classification system based on STM32F103C8T6 microcontroller. The hardware part of the system is mainly composed of STM32F103C8T6 chip control center module, infrared detection circuit module, voice interaction circuit module, voice output, LED indicator circuit, garbage detection infrared circuit, OLED display circuit, photosensitive induction circuit, LED light bar lighting circuit, solar power supply and lithium battery charging and discharging module. It can prompt and guide users to classify kitchen waste, harmful waste, recyclable waste and other waste. It can realize the functions of garbage quantity detection, solar charging and power supply, photosensitive judgment control LED lamp to turn off the light during the day and turn on the light at night.