As the rising of social networks，represented by Micro-blog and we chat，in China，a full message dissemination and diffusion transmission chain has formed during the new media era，and profound influences have been made on the habits of individual cognitive learning，investment philosophy，behavioral patterns， and asset prices patterns in financial markets． In the scenario of the new media，this study investigates the correlation between micro-blog information quality and stock price synchronicity，taking the financial social networks platform as the breakthrough point． Based on the three dimensions of information attention，network reliability，and update frequency，the paper first constructs a index system for network information quality， then theoretically and empirically studies the influence of the social network‘s information quality on stock price synchronicity． The findings suggest the connection between the two is clear negative and U-shaped rela-tions． Our results provide evidences from Chinese stock market to confirm the validity of social networks on stock price synchronicity．