The invention provides a page downloading control method and a page downloading control system for an IE (Internet Explorer) core browser. The method provided by the invention comprises the following steps of: S1, starting an IE core browser process and starting a preset downloading process; S2, registering a communication protocol in the IE core browser process and waiting a page downloading request based on a corresponding communication protocol; S3, when the IE core browser process receives the page downloading request, transmitting the page downloading request to the downloading process; S4, judging, by the downloading process, whether a requested file is previously written into a cache according to the page downloading request; if so, executing an S5; otherwise, executing S6, S7 and S8; S5, extracting the file from the cache; S6, downloading the corresponding file from the server according to the page downloading request; S7, returning downloading state information to the IE core browser process in a downloading process; and S8, writing the downloaded file into the cache. Through the method and the system, a page downloading process of the IE core browser can be effectively controlled, so that the efficiency and the stability of page downloading are improved.