Abstract: A spectrally arbitrary pattern A of order n is a sign pattern such that every monic real polynomial of degree n can be achieved as the characteristic polynomial of a matrix with sign pattern A.A sign pattern A is minimally spectrally arbitrary if it is spectrally arbitrary but there is not proper subpattern of A which is spectrally arbitrary.In this paper,two new sign patterns which are minimally spectrally arbitrary are proved by the Nilpotent-Jacobian method.