Objective　To investigate and analyze the researches and guarantee mechanisms of Chinese undergraduate students' social practice， to understand the current situation of college students' social practice and research quality and to provide the reference for the development of college students' social practice guarantee mechanism in China. Methods　With the “University” “college students” “social practice” as key words， we retrieved published documents about long-term mechanism of CUSSP dating to March 2014， from Chinese journal full text database（CNKI）， China outstanding master's degree thesis database， Chinese Excellent Doctor Degree Dissertation Full-text Database， Wanfang， CMFD， CDFD，VIP， Google and Baidu， etc. We classified the including documents based on evidence-based scientific evidence grading standards， analyzed Grade C and above documents only. Results　A total of 22 relevant studies were included； 4 of them are policy studies with Grade B， 18 of them are cross-sectional studies with grade C. The studies showed： ①The policy studies give important sugges-tions on the content， form， effect， construction and evaluation system of long-term mechanism of CUSSP. ②18 cross-sectional studies surveyed over 14 504 students' social practice conditions show the method-ology of most of the studies is described unclearly or non-standard however. ③12 studies have inves-tigated the Chinese college students' attitude towards social practice and actual participation， with 5 studies about the time of participation and 5 about the condition of combination with specialty. The undergraduate students can recognize the importance of social practice， however， the range， duration and times of their actual participation are limited， and the combination with their major is not close enough. ④7 studies have investigated the main problems of college students' social practice and 5 studies have investigated the students' satisfaction. At present， there exist many problems in CUSSP， of which the most difficult things are： hard-to-contacting practice units， lack of funds， lack of teacher guidance， hard-to-determining the practical projects etc. The students' overall satisfaction is “general”. Conclusions　①There is lack of high-quality studies about CUSSP， and the methodology of studies should be improved and standardized. ②Strengthening the long-term mechanism and evaluation system construction is urgently needed to ensure that students can conduct long-term， effective and stable social practice.