  The strong attractive interaction of the $\phi$ meson and the proton is
reported by ALICE collaboration recently. The corresponding scattering length
$f_0$ is given as $Re(f_0)=0.85\pm0.34(stat)\pm0.14(syst)$fm and
$Im(f_0)=0.16\pm0.10(stat)\pm0.09(syst)$fm. The fact that the real part is
significant in contrast to the imaginary part indicates a dominate role of the
elastic scattering, whereas the inelastic process is less important. In this
work, such scattering processes are inspected based on a unitary
coupled-channel approach inspired by Bethe-Salpeter equation. The $\phi p$
scattering length is calculated based on this approach, and it is found that
the experimental value of the $\phi p$ scattering length can be obtained only
if the attractive interaction of the $\phi$ meson and the proton is taken into
account. A significant outcome of such attractive interaction is a two-pole
structure in the $\phi p$ scattering amplitude. One of the pole, locating at
$(1969-i283)$~MeV might correspond to $N(1895)1/2^-$ or $N(1875)3/2^-$ listed
in the review of the Particle Data Group(PDG). The other one, locating at
${1949-i3}$~MeV should be a $\phi N$ bound state, which has no counterpart in
the PDG data.
