DNA computing is one of the most popular research fields in recent years, it can solve many NP problems such as the satisfiability problem [5], the maximum cut problem [10] and the binary integer programming problem [11]. In this research we proposed a bio-logical molecular Parallel Modular model using the Adleman-Lipation model [1]. In the future we will apply this Bio-Logic Modular model on solving RSA public-key cryptosystem better and faster.