The dissemination and communication of academic literatures on the Social Network Services (SNS) have changed the configuration of the academic communication. The SNS communication is the stretching of "informal scholarly communication" among scientists and the "informal scientific dissemination" among scientists and the public. This paper takes Evolutionary Biology as the research sample, downloaded 30290 literatures data of WoS from 2012 to 2017 about the field of Evolutionary Biology, and collected the tweeters data by Twitter on Altmetrics.com. And then we try to analyze the scientific communication about academic literatures on SNS. The conclusion as following: firstly, there is weak correlation between formal communication and informal communication, and the Altmetrics mainly stem from informal communication on SNS. Secondly, the communication favor to the informal scientific dissemination, forming a new "SNS & Scientific Dissemination" mode. Thirdly, the scientific communication on SNS has special characteristics, as communication time "easy come, easy go", and the scope of communication influenced by different country.