The invention provides link statistics management methods and device and is applied to a link load balancing system. A method comprises the steps of obtaining a to-be-allocated message; judging whether a quintuple carried by the to-be-allocated message is consistent with any historical quintuple in a session table or not; determining a corresponding target session for the to-be-allocated message according to a judgment result; judging whether a communication link is an invalid link or not according to an interface working state of the communication link on which the target session is located;ageing the target session on the communication link under the condition that the communication link is the invalid link; and reducing the session statistics quantity of the communication link by 1. Through application of the embodiments of the invention, load balance of each communication link is further improved, and communication efficiency is improved.