  We perform global fits to the most recent data (after summer 2014) on Higgs
boson signal strengths in the framework of the minimal supersymmetric standard
model (MSSM). We further impose the existing limits on the masses of charginos,
staus, stops and sbottoms together with the current Higgs mass constraint
$|M_{H_1} - 125.5\,{\rm GeV}| < 6$ GeV. The heavy supersymmetric (SUSY)
particles such as squarks enter into the loop factors of the $Hgg$ and
$H\gamma\gamma$ vertices while other SUSY particles such as sleptons and
charginos also enter into that of the $H\gamma\gamma$ vertex. We also take into
account the possibility of other light particles such as other Higgs bosons and
neutralinos, such that the 125.5 GeV Higgs boson can decay into. We use the
data from the ATLAS, CMS, and the Tevatron, with existing limits on SUSY
particles, to constrain on the relevant SUSY parameters. We obtain allowed
regions in the SUSY parameter space of squark, slepton and chargino masses, and
the $\mu$ parameter. We find that $|\Delta S^\gamma/S^\gamma_{\rm SM}|\lsim
0.1$ at $68\%$ confidence level when $M_{\tilde{\chi}^{\pm}_1}>300$ GeV and
$M_{\tilde{\tau}_1}>300$ GeV, irrespective of the squarks masses. Furthermore,
$|\Delta S^\gamma/S^\gamma_{\rm SM}|\lsim 0.03 $ when
$M_{\tilde{\chi}^\pm_1,{\tilde{\tau}_1}} > 500$ GeV and $M_{{\tilde
t}_1,{\tilde b}_1} \gsim 600$ GeV.
