Because of the complexity of measurement condition, the cycle slips of carrier phase are unavoidable. In order to achieve the high precise dynamic positioning for network RTK technology, the cycle slips of reference station data must be detected and corrected in real-time. Considering the characteristic of continuous operational reference station network, a simple method of real-time cycle slips detection and correction for reference stations data is proposed based on the ionosphere-free combination of dual frequency observation and three difference observations which used as restrained condition. Then, the data process flow is designed. The experiments show that whatever the long baseline or short baseline, short-term loss of lock or a few minutes of data loss, this method can correctly achieve cycle slips detection and correction.