  A new polymer black hole solution in loop quantum gravity was proposed
recently. The difference between the polymer black hole and Schwarzschild black
hole is captured by a quantum parameter $A$. In order to get the constraints on
parameter $A$, we consider the observational constraints imposed on $A$ by
using the Solar System experiments and calculate the deflection of light,
Shapiro time delay, perihelion precession and obtain the effects associated
with parameter $A$. Moreover, the parameterized post-Newtonian approach of this
loop quantum gravity black hole was also carried out. It turns out the tightest
constraint on $A$ can be improved to $0<A<4.0\times10^{-6}$.
