The invention discloses a multipoint service performance statistic method and system in a frame type data communication device, and relates to the field of performance statistics of the data communication device in optical communication. The method comprises following steps of distributing 4 counters to multipoint services; binding the IDs of the 4 counters with the multipoint services; issuing to service processing units in which all multipoint service ports are located; after import service processing units obtain the data packets of the multipoint services, setting the fields of the CounterID as 1; setting the fields of the CounterID as Length; after export service processing units receive the data packets of the IDs and fields of the CounterID and the CounterID, setting the fields of the CounterID as 1; setting the fields of the CounterID as Length; and reporting the IDs and fields of the 4 counts to a master control unit by all export service processing units periodically through the management channels in network elements. According to the method and the system, the problem network elements can be positioned, and statistics is carried out on packet loss resulting from various conditions.