  The chaotic inflation is inconsistent with the observational constraint at
68\% CL, we show that the enhancement mechanism with a peak function in the
non-canonical kinetic term not only helps the chaotic model
$V(\phi)=V_0\phi^{1/3}$ satisfy the observational constraint at large scales,
but also enhances the primordial scalar power spectrum by seven orders of
magnitude at small scales. The enhanced curvature perturbations can produce
primordial black holes with different masses and secondary gravitational waves
with different peak frequencies. We also show that non-Gaussianties of
curvature perturbations have little effect on the abundance of primordial black
holes and the energy density of the scalar induced secondary gravitational
waves.
