  This article reports a sample of 1830 strong [O III] {\lambda}5007
emission-line compact galaxies discovered with the LAMOST spectroscopic survey
and the photometric catalog of SDSS. We newly identify 402 spectra of 346
strong [O III]{\lambda}5007 emission-line compact galaxies by finding compact
isolated point sources. Combined with the samples in our previous work (Liu et
al. 2022), this returns a sample of 1830 unique strong [O III]{\lambda}5007
emission-line compact galaxies with 2033 spectra of z <= 0.53. For the sources
with 2{\sigma} [OIII]{\lambda}4363 detections, we calculate the gas-phase
metallicity with the direct-Te method, and verify that the strong-line
metallicity diagnostics calibrated with the direct-Te method also applies to
this sample. The strong [O III]{\lambda}5007 emission-line compact galaxies
fall below several Te-calibrated mass-metallicity relations. The N/O
measurements of the strong [O iii]{\lambda}5007 emission-line compact galaxies
mainly locate at a plateau at low metallicity, indicating the product of
primary nucleosynthesis. The Ne3O2 and O32 relation follows a tight linear
relation with no redshift evolution. The Ne3O2 anti-correlates with the stellar
mass, and at fixed stellar mass the Ne3O2 increase with the redshift. Eight
sources with asymmetric [O III]{\lambda}5007 emission-line profiles have been
identified, however with no [O III]{\lambda}4363 detection, which proves the
rich metal content and complex ionized gas kinematics within the galaxies.
Higher-resolution spectroscopy will be necessary to identify the ionized gas
components in detail.
