To comprehensively evaluate the safety risk status of street trees, this paper investigated and detected eight risk factors of trees on three urban expressways in Shenzhen, including Beihuan Avenue, Shennan Avenue, and Binhe (Hai) Avenue, and evaluated their safety risks using the VTA risk matrix method. The research results indicate that over 95% of the street tree risks on three urban expressways are acceptable or negligible, but there are still hidden trees with moderate or even significant risks, and the order is Beihuan Avenue > Shennan Avenue > Binhe (Hai) Avenue; Trees such as Falcataria falcata, Cinnamomum burmannii, Khaya senegalensis, Acacia mangium, Spathodea campanulata, and Eucalyptus have a higher likelihood of risk, while the safety of Dracontomelon duperreanum, and Syzygium hainanense is relatively high; The main trunk may be the central part of the broken/lodging parts of street trees, but the whole plant lodging rate is also higher in Khaya senegalensis, Falcataria falcata, Eucalyptus, and Acacia mangium; The frequency of occurrence of various risk factors varies among street tree species with higher risk levels, but the frequency of occurrence of trunk inclination factors is generally higher, followed by bark damage, trunk decay, and trunk hollow factors, and the risk factors may increase with the growth of tree size and age. The research findings in this paper may serve as a scientific foundation for the daily management and safety risk prevention and control of urban street trees susceptible to typhoon attacks.