There is one kind of techniques for determining base of the intersection of subspaces in P
n
.Each base of two generated subspaces V
1
=L(α
1
α
2
\:
α
m
) 与 V
2
=L(β
1
β
2
\:
β
k
) is found.The vector α∈P
n
is denoted by base to express the basis set of solutions of component homogeneous system of linear equations that is the coordinate of α in the base of two subspaces.The result is used to determine the bases of subspaces V