The high-speed digital image transmission method for high speed camera is proposed, in order to overcome the current approach to long distance image transmission technology by LVDS. It can decrease the requirement of cable quality and system complexity, and be unnecessary of data relay. FPGA was used as the main controller. The received image data of LVDS format was changed into the signal of TTL format, and then was stored into the appointed location. Then the image data was transmitted by optical fiber after the high-speed serial data was gotten by RocketIO. The bit-error number was zero when 32 Gbit data is transmitted at the rate of 1.6 Gbps. The result shows that the method has the advantage of low bit-error rate, simple system design, excellent performance and convenient expansibility.