The seed-metering device of the no-tillage planter was driven by the ground wheel. Sliding was unavoidable when the ground was covered by the straw. High sliding brought seeding absence and affected the quality of sowing. In order to monitor the sliding of the ground wheel, a monitoring system composed of hardware and software was designed based on ATMEGA16 Microcomputer. In the system, the practical and the theoretical driving distance of the ground wheel were measured by the photoelectric sensor and rotary encoder respectively, then the sliding can be calculated and displayed on the LED. The system could achieve the data of sliding when the planter worked, and this could insure that the driver may recognize the working conditions at any moment. So it had very important significance which can improve the precision of sow.