Objective: In order to prevent the problem of small range electronic belt scale with inefficient method of traditional intermediate verification, low verification accuracy and security. Methods: A on-line intermediate check device was designed for small range electronic belt scale, which was composed of digital transmission control module and automatic loading module. Taking standard weight as input quantity, the upper computer controlled the manipulator to grab the weight onto the transmission belt to implement cyclic loading, then evaluated the measurement results and upload the evaluation results to the cloud. Results: After verification test and data analysis, for electronic belt weigher, it could ensure that the checking loading accuracy fluctuates within ±0.5% of the error range at two flow nodes of 1 440 kg/h and 3 600 kg/h. The remote control and loading process were stable, single verification test took about 3 minutes which was only one third of that of traditional methods. Conclusion: The download and upload of verification data are stable, cloud can monitor and warn the verification results in real time.