Abstract: Problems about implementing beamforming on fixed-point DSP, such as eigenvalue-decomposition of matrix and non-linear calculation, are discussed and solutions to these problems are given out in this paper.Two methods, conventional beamforming(CBF) and robust Capon beamforming(RCB) implemented with floating-point and fixed-point are compared.Performance of using Jacobi method to calculate the eigenvalue-decomposition of Hemritten matrix with floating-point and fixed-point are compared.Steps to quickly developing signal processing algorithms on fixed-point DSP are briefly described and given out as references for future work.