In web 2.0 era, there was little researches focused on the effect of mobile social software influencing spoken English learning in reforms of technology assist language learning. This study based on the theory of mobile micro learning and mobile learning community, a total of 72 primary school students were empirically investigated the learning outcome of using mobile social software to learn English after class for one semester. The results showed that using mobile social software to learn English after class can improve students' English speaking ability, specific performance in word accuracy, number of sentences and voice tone, and especially has significant effect on increasing the number of sentences.