The forwarding performance of general-purpose multi-core server cannot satisfy the demand of wire-speed processing of high-speed traffic very well. Although the heterogeneous network processing platforms combining software and hardware have been applied widely in network processing field for their high performance and flexibility, the problem of designing high-efficiency routing table lookup algorithm in this platform still needs further study. The main problems restricting the performance improvement of heterogeneous network processing platform include low utilization of multi-core resources, serious shared-resources access conflict and large amounts of memory access. Thus, this paper proposes a routing lookup mechanism named CPL (Configurable Parallel Lookup) based on heterogeneous network processing platform NPP (Network processing Platform). The technologies of multi-thread parallel lookup and multi-copy management of routing tables in CPL improve the utilization of multi-core resources and accessing routing tables with zero-conflict. In addition, given that the distribution differences of routing prefix in different scenarios, CPL regulates the structure of multi-level routing table by configuration, which reduces the number of routing table accesses efficiently. At last, after making the performance comparison of CPL and traditional lookup algorithm, the experiments demonstrate the availability and high-efficiency.