  We investigate spin-charge mixing effect on resonant tunneling in
spin-polarized Tomonaga-Luttinger liquid with double impurities. The mixing
arises from Fermi velocity difference between two spin species due to Zeeman
effect. Zero bias conductance is calculated as a function of gate voltage
$V_{\rm g}$, gate magnetic field $B_{\rm g}$, temperature and magnetic field
applied to the system. Mixing effect is shown to cause rotation of the lattice
pattern of the conductance peaks in $(V_{\rm g},B_{\rm g})$ plane, which can be
observed in experiments. At low temperatures, the contour shapes are classified
into three types, reflecting the fact that effective barrier potential is
renormalized towards ``perfect reflection'', ``perfect transmission'' and
magnetic field induced ``spin-filtering'', respectively.
