  Pr$_{1-x}$Ca$_x$Ba$_2$Cu$_3$O$_{7-\delta}$($x\approx$0.5) thin films have
been grown on SrTiO$_3$ and YSZ substrates by the pulsed laser ablation. The
substrate temperature dependence of orientation and superconducting poperties
were systematically studied. Good quality \textit{c} and {a}-axis orientated
films can be obtained on SrTiO$_3$ via changing the substrate temperature
solely. On YSZ, films with good \textit{c}-axis orientation can be grown, while
it is hard to grow films with good \emph{a}-axis orientation by changing
substrate temperature alone. The highest $T_{C0}$ is about 37K, which is found
in the films grown on YSZ with a good \emph{c}-axis orientation. For the films
grown on STO, however, the highest $T_{C0}$ is about 35.6K with a mixed
orientation of \emph{c}-axis and \emph{a}-axis. In most of the superconducting
films, the weak temperature dependence of the normal state resistivity, as
characterized by small $R(290K)/R(50K)\leq2$ ratios, together with a weak
localization behavior just above $T_C$ could be attributed to the essential
scattering due to the localized electronic states. The superconducting
transitions in a field up to 10 T along \textit{c}-axis have been measured on a
\textit{c}-axis oriented film grown on SrTiO$_3$. The zero-temperature in-plane
upper critical field $B^{ab}_{C2}$(0) is estimated from the resistivity
transition data.
