  To explaine the matter-antimatter asymmetry, a supersymmetric extention of
the standard model is proposed where baryon and lepton numbers are local
gauged(BLMSSM), and exotic superfields are introduced when gauge group is
enlarged to $SU(3)_C\otimes SU(2)_L\otimes U(1)_Y \otimes U(1)_B \otimes
U(1)_L$. As signals of new physics have not been observed on Large Hadron
Collider, the parameter space relevant to the masses of new particles is
stringently constrainted. By diagonalizing the mass squared matrices for
neutral scalar sectors and the mass matrices for exotic quarks, we plot the
masses of new particles varying with different parameters with some
assumptions, so the constraints on model parameter is obtained with different
lower limit on particle mass.
