The mating behaviors of Lacerta viviparawere studied in the May of 2007 and 2008 by the methods of instantaneous and scan sampling and of all-occurrence recording. The results show that the basic patterns of mating behavior of L.vivipara are chasing; biting abdomen; encircling; sexual intercourse and separating. Chasing accounts for 2.35% of total time; biting abdomen for 0.51%; encircling for 8.44% and sexual intercourse for 88.70%. The mating activities begin at 8 a.m. and focus from 9 a.m. to 1 p.m. During the period, the average illumination intensity is (1 009.90±77.06)×10² lx ; the average air temperature is (31.53±0.36)℃(25.10-39.20℃); the average ground temperature is (41.03±0.60)℃(28.30-56.30℃); and the average humidity is 27.54%±0.58%(20.00%-43.50%). Environment factors, such as ground temperature, illumination and air temperature, mainly affected the mating behaviors of L.vivipara.