Abstract: Piper sarmentosum Roxb is a wild Piper plant with great value of development and utilization in Hainan. Different concentrations (100, 400 and 800 mg/L) of 4 different growth regulators (Genwang, IAA, IBA and NAA) were used to study the rooting technology of cuttings of P. sarmentosum with the base of the cuttings soaked for different time (0.5 h, 2 h and 4 h). The results showed that, with respect to rooting rate, average number of roots, and length of the longest root, all treatments obtained better results than those of the control. The best was the treatment with 100 mg/L IBA for 5 h, with the rooting rate of 80.00%, the average number of roots 5.67 and the length of the longest root 10.6 cm. The other nine species of Piper in Hainan rooted well using the same method.