  The infrared divergent scalar three-point integrals are evaluated by the loop
regularization method. Three kinds of infrared divergent integrals, i.e.,
massless triangle diagram, triangle diagrams with one and two massive internal
lines, are systematically evaluated by loop regularization, analytic results
are obtained. According the method, the infrared divergences are regulated by
the so-called sliding scale $\mu_{s}$ which plays the role of infrared cutoff.
The amplitudes obtained through loop regularization depend on $\mu_{s}$ such
that we may extract different contribution by varying $\mu_{s}$. Some general
results for evaluation of scale one-loop triangle diagram are also derived.
