Abstract: Insect pest species on plants in the exhibition greenhouse of Beijing Botanical Garden and the their harmful situations were studied in spring, 1993. It was indicatcd that the main pests were Aphis gossypii, Myzus persicae, Panonychus cirri, Icerya purchasi, Ceroplastes rubens and Pseudaulacaspis pentagona etc. Finally, the control of these main pests such as aphis, scale and whilefly was described.