The limitation of data communication between the WinCC system and Programmable Logic Controller in the commonly used monitoring system of large forging equipment was analyzed. In order to improve the data communication rate, a new high speed communication method was presented according to the features of Programmable Logic Controller and WinCC. First, all data in one DB in a sequence were stored through Programmable Logic Controller. Data were transmitted to WinCC by Profibus industrial bus via S7 communication protocol. Then the data were unpacked, recorded, graphically displayed and queried by using C script in WinCC system. Lab experiments and industrial field application on 300MN forging hydraulic press were implemented. The results show that the method can solve the problem of low speed communication between WinCC and Programmable Logic Controller and supply an inexpensive, practical and reliable way for high speed communication between the upper and lower control systems.