  With the development of the circular collider, it is necessary to make
accurate physics experimental measurements of particle properties at higher
luminosity $Z$ pole. Micro-pattern gaseous detectors (MPGDs), which contain
Gaseous Electron Multiplier (GEM) and Micro-mesh gaseous structures
(Micromegas), have excellent potential for development as the readout devices
of the time projection chamber (TPC) tracker detector. To meet the updated
physics requirements of the high luminosity $Z$ from the preliminary concept
design report (preCDR) to concept design report (CDR) at the circular electron
positron collider (CEPC), In this paper, the space charge distortion of the TPC
detector is simulated with the CEPC beam structure. Using the multi-physics
simulation software package, the distribution of ion estimated by Geant4 is
used as the input for the differential equation, and the relationship between
the ion density distribution and electric field in the detector chamber is
simulated. These simulation results show that the maximum deviation for Higgs
$\mathcal{O}$(25 $\mu$m) meets the performance requirements in CEPC TPC
detector at the high luminosity $Z$ pole, while it is still a considerable
challenge for $Z$ pole, with the maximum deviation $\mathcal{O}$($>100~\mu$m).
According to the previous developments, the cascaded structure of GEM and
Micromegas detector has been measured. The new considerations of the detector's
requirements were given, the gain needs to be reached to about 2000 with
IBF$\times$Gain under 0.1, and IBF means the ions back flow ratio of the
detector. The pixel TPC is a potential option to replace the traditional MPGDs
with the low gain, low occupancy, and outstanding pattern recognition. Finally,
some update parameters and experiments results were compared.
