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A transfer leing system was designed to pre-dict Xylosma racemosum compression strength. Near-infra-red (NIR) spectral data for Acer mono and its compression strength values were used to resolve the weak generaliza-tion problem caused by using a X. racemosum dataset alone. Transfer component analysis and principal component analy-sis are domain adaption and feature extraction processes to enable the use of A. mono NIR spectral data to design the transfer leing system. A fi ve-layer neural network rel-evant to the X. racemosum dataset, was fi ne-tuned using the A. mono dataset. There were 109 A. mono samples used as the source dataset and 79 X. racemosum samples as the target dataset. When the ratio of the training set to the test set was 1:9, the correlation coefficient was 0.88, and mean square error was 8.84. The results show that NIR spectral data of hardwood species are related. Predicting the mechan-ical strength of hardwood species using multi-species NIR spectral datasets will improve the generalization ability of the model and increase accuracy.