The invention discloses a pixel circuit, a driving method of the pixel circuit, an organic light-emitting display panel and a
display device. A unified public
voltage signal is inputted to a first
electrode of a drive
transistor before a
data signal is written into a control
electrode of the drive
transistor; the public
voltage signal and a
threshold voltage of the drive
transistor are written into a control
electrode of the drive transistor, so that relatively
high current can pass through the drive transistor,
threshold voltage deviation, which is caused by
bias stress, of the drive transistor can be recovered, a retarding effect of the drive transistor can be improved and the occurrence of a
ghosting phenomenon can be prevented; in addition, when the
data signal is written into the control electrode of the drive transistor, a time of writing the
data signal can be shortened, and the control electrode and the first electrode of the drive transistor can achieve jump through a unified potential, so that a difference, which is caused by stray
capacitance between the control electrode and the first electrode of the drive transistor, can be prevented, the problem that
threshold voltage grabbing is inconsistent due to
voltage jump can be avoided and consistent brightness of the first frame after high-low
grayscale switching can be guaranteed.