  Several new experimental concepts in high-energy particle physics have been
proposed in recent years. The physical goals include precisely measuring the
properties of particles such as Higgs, Z and W, and even looking for signs of
new physics at future colliders. To meet the evolving requirements for particle
track detector, Time Projection Chamber(TPC) detector prototype integrated with
a UV laser track system was developed for the main track detector at Circular
Electron Positron Collider(CEPC). This prototype consists of 6 horizontal laser
tracks around TPC detector chamber, a fast electronics readout of 1280
channels, a GEM detector with $200\times 200\,mm^2$ active area, and the DAQ
system. The hit resolution, dE/dx resolution and drift velocity were studied by
measuring and analyzing using the TPC prototype and UV laser tracks. The dE/dx
resolution of the prototype was measured to be $(8.9\pm0.4)\,\%$. Extrapolating
this to CEPC TPC with 220 layers and longer track, the resolution was estimated
to be $(3.36\pm0.26)\,\%$. All results indicated that the TPC detector
prototype integrated with UV laser tracks can work well.
