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The B-spline finite strip method is developed for the prediction of the buckling ofrectangular composite laminated plates under the combined action of applied uniaxial mechanical stressand increasing temperature. The analysis is conducted in two stages, namely an in-plane stress analysis inthe pre-buckling stage to determine the pre-buckling stresses, folowed by a buckling analysis using thesedetermined stresses. The buckling analysis is based on the use of first-order shear deformation platetheory. The permitted lay-up of the laminates is quite general, within the constraint that the plate remainsflat prior to buckling, and a wide range of boundary conditions can be accomodated. A number ofapplications is described and comparison of the results generated using the finite strip method is madewith the results of previous studies.