The invention discloses a testing method for detecting glass platinum rhodium defect occurrence conditions. A high temperature resistant crucible is adopted, glass and overflow brick tips are heated,then, heat preservation is performed, the condition under which the surfaces of the overflow brick tips have platinum rhodium defects can be observed, then, the platinum rhodium defects can be avoidedas much as possible in the production process, and the platinum rhodium defects at the overflow brick tips can be observed and detected under different temperature and humidity conditions. Accordingly, the basis is provided for production line technological parameter setting, and the production line reject ratio is lowered.