This paper proposes a quantization scheme for low density parity check(LDPC) codes based on scaling factor by analyzing message distribution and the effect of quantization saturation. Messages are scald for the check nodes and variable nodes, and for the initial channel value. Using the scaling, the scheme allows the integer part of message to include more information, and can lower the effect of quantization saturation. Messages of nodes are quantized with (q; 0). Due to the application of integer part instead of floating point operation, the hardware complexity is significantly reduced. Simulation of (7 493, 3 048) using normalized Min-Sum displays an implementation loss of about 0.1 dB compared with floating performance.