Provided are a method for Ternary Contents Address Memory (TCAM) table management and a computer-readable recording medium for recording a program that implements the method. The method includes the steps of: a) dividing a memory area of TCAM into fixed-size blocks depending on priority to configure a lookup table; b) assigning a priority to each routing entry being inputted to the lookup table based on prefix length; c) storing the routing entry having been assigned with the priority in a lookup table block of a corresponding priority; and d) when a modification occurs in the lookup table, modifying the lookup table to maintain an arranged state for a longest prefix match.