A new reconstruction algorithm based on maximum entropy theory for two orthographic directions is proposed. The method can acquire a good reconstruction result, which just needs two orthographic projection data. The new algorithm can make experimental system simple and show great superiority to multi-peaks asymmetrical flow fields reconstruction because only two orthographic direction projection data is necessary. Single-peak random cosine function, two-peak random cosine function, three-peak random cosine function are used as tested fields in numerical simulation, respectively. We also consider the ability of the proposed algorithm to suppress the noise. Under the condition of Gauss noise, the numerical simulation results show that the root mean square error of single-peak random cosine function is improved by 62.8%, the root mean square error of two-peak random cosine function is improved by 63.3%, and the root mean square error of three-peak random cosine function is improved by 58.6%.