A kind of cement bag counter based on multi-sensor data fusion technology was designed to solve the existing deviation problems of current cement bag counter in counting process. A photoelectric switch sensor was used to detect the presence or absence of cement bag. A tilting cape sensor was used to test overlapping bag. An optical encoder was used to determine joining bag by measuring real-time transmission speed. The MCU accurately count cement bag number by intelligent information processing of three sensors. The experimental results showed that the counter system is stable and reliable.