  The intermittency is investigated when the current reversal occurs in a
deterministic inertia ratchet system. To determine which type the intermittency
belongs to, we obtain the return map of velocities of particle using
stroboscopic recording, and numerically calculate the distribution of average
laminar length ${<}l{>}$. The distribution follows the scaling law of ${<}l{>}
\propto {\epsilon}^{-1/2}$, the characteristic relation of type-I
intermittency.
