  PandaX-4T experiment is a deep-underground dark matter direct search
experiment that employs a dual-phase time projection chamber with a sensitive
volume containing 3.7 tonne of liquid xenon. The detector of PandaX-4T is
capable of simultaneously collecting the primary scintillation and ionization
signals, utilizing their ratio to discriminate dark matter signals from
background sources such as gamma rays and beta particles. The signal response
model plays a crucial role in interpreting the data obtained by PandaX-4T. It
describes the conversion from the deposited energy by dark matter interactions
to the detectable signals within the detector. The signal response model is
utilized in various PandaX-4T results. This work provides a comprehensive
description of the procedures involved in constructing and parameter-fitting
the signal response model for the energy range of approximately 1 keV to 25 keV
for electronic recoils and 6 keV to 90 keV for nuclear recoils. It also covers
the signal reconstruction, selection, and correction methods, which are crucial
components integrated into the signal response model.
