Abstract: Image processing often used bilinear interpolation algorithm to zoom images,its speed directly related to the real-time image processing speed.In multicore computer designed a bilinear interpolation parallel program,achieved to high speed process of image zooming.Full use of multicore technology to enhance the resource utilization of multicore processors,shorten the execution time and played superior performance of multicore system.Through experiment results,it can be seen that this algorithm showed a good ability in accelerate large image processing,indicate the bilinear interpolation multicore parallel algorithm in application of real-time image zooming is effective and feasible.