The present disclosure is related to a method for monitoring upstream burst performance in a point to multi-point access network. The method comprises: determining the expected time of the upstream data burst from the current terminal end (TE) reaching the head end (HE) using the timeslot assigned to the current TE, monitoring the actual time of the upstream data burst from the current TE reaching the HE, calculating and saving the difference between the expected time and the actual time of the upstream data burst from the current TE reaching the HE; calculating and outputting whether the difference is equal to or exceeds the TE's performance index value for the predetermined monitoring terms. The method provided by the present disclosure may monitor upstream burst performance of the entire network and discover the TEs with potential malfunctions, to effectively improve the network's stability.