The invention provides a stream forwarding method, device, server and system for video advertising insertion. The method includes the steps that a video server obtains a play list, wherein the play list comprises feature film information and advertisement information played at different time periods; according to the play list, a feature film TS stream or an advertisement TS stream, a PAT table, a PMT table and PID information of the feature film TS stream or the advertisement TS stream are sequentially obtained; first permutation is carried out on the PAT table, the PMT table and the PID information of the feature film TS stream and / or the advertisement stream, and by means of first permutation, the PAT table, the PMT table and the PID information of the feature film TS stream are the same as those of the advertisement TS stream; the feature film TS stream or the advertisement TS stream after first permutation is sent to an IPQAM. By means of the stream forwarding method, device, server and system, the blurred screen phenomenon occurring when a feature film and advertisement are switched during video advertising insertion is eliminated.