Based on the daily precipitation data from 1961 to 2011 in Shenzhen City, the precipitation trends in Shenzhen were investigated by performing the Mann-Kendall (MK) tests on the annual precipitation, precipitation days, precipitation intensity, flood season precipitation and non-flood season precipitation. The annual precipitation and precipitation intensity were tested on mutation by sequential cluster method and analyzed on period by wavelet method. The results indicate that the annual precipitation, precipitation days, precipitation intensity, precipitation in the flood season and non-flood season precipitation are increasing, and the precipitation days increase significantly. The mutation of the annual precipitation occurred in 1963 and 2008, and 1993 witnessed the mutation of the precipitation intensity. There are 6 years and 11 years oscillating periods in both the annual precipitation and precipitation intensity, and the periodic mutation become more obvious after 1990. These variation trends of precipitation in Shenzhen are related to the high-speed development of this city, and it is of great significance to accurately understand the influence of Shenzhen precipitation trends on urban development in this region.