  In this manuscript, we consider the hairy Schwarzschild black hole that
evades the no-hair theorem. The hair is induced by an additional source from
surroundings, such as dark matter, that has a constant energy-momentum
tensor(EMT). We study the strong gravitational lensing of light in the
background of the hairy Schwarzschild black hole. We observe that the lensing
coefficient $\overline{a}$ increases with $\alpha$ but decreases with $\ell_0$.
The opposite effect is observed for the lensing coefficient $\overline{b}$ and
the impact parameter $b_m$. We also notice that the angular position
$\theta_\infty$ decreases with $\alpha$ but increases with $\ell_0$, whereas
the angular separation $s$ increases with $\alpha$ and decreases with $\ell_0$.
For all parameters mentioned, we regain their values for the Schwarzschild
black hole whenever we put either $\alpha=0$ or $\ell_0=1$. With the help of
the Gauss-Bonnet theorem, we briefly describe the weak gravitational lensing in
the background of the hairy Schwarzschild black hole.
