A method of adaptive filtering for multiple reference line of intra prediction in video coding, a video encoding apparatus and video decoding apparatus therewith are provided in the disclosure. In the method of intra prediction in video coding, a method of adaptive filtering is used to dynamically determine operation of filtering is applied to input samples in the intra prediction or not, which can reduce the complexity of the intra prediction in video coding if multiple reference lines are used for the operation of the intra prediction, and also increase the efficiency of compressing performance of ultra-high resolution video.