  In this paper we calculate the contributions to the branching ratio of $B\to
X_s \gamma$ from the charged Pseudo-Goldstone bosons appeared in one generation
Technicolor model. The current $CLEO$ experimental results can eliminate large
part of the parameter space in the $m(P^\pm) - m(P_8^\pm)$ plane, and
specifically, one can put a strong lower bound on the masses of color octet
charged PGBs $P_8^\pm$: $m(P^{\pm}_8) > 400\;GeV$ at $90\%C.L$ for free
$m(P^{\pm})$.
