A load bearing test on parallel chord wooden trusses with two web member systems under 1.9 kPa of uniform live load were conducted to evaluate the stresses and deformation of the light wooden truss joists.The results showed that under the same load,the deformations of the midspan and the ends of the two trusses were almost the same.The deflection of the trusses at midspan calculated by finite element simulation was 4.37 mm and 4.17 mm,respectively,which were consistent with the experimental results.The finite element simulation method proved to accurately predict stresses and deformation of parallel chord wooden trusses.This method could be applied in safety design for wooden truss joist.