The research on land-use transfer has always been a hot spot for domestic and foreign scholars, and it is also the focus of practical works. In China, the Beijing Municipal Government has put forward many forestry policies, emphasising the need to improve the collective forest land transfer system against the new background of the capital’s forestry development. This paper built a binary logistic regression model and structural equation modelling (SEM) based on the theory of planned behaviour (TPB), collected research data through questionnaires and explored the factors that affect the willingness of the transfer of forest land. The research showed that (1) farmers’ attitudes and behaviours had significant negative impacts on the willingness to transfer forest land. When farmers are assured that they know more about the forest land’s management rights transfer policy, and the forest land’s management rights transfer can bring more income to them, they will be satisfied with the existing forest land policy, which is more conducive to the forest land’s management rights transfer; (2) the perceived behaviour control of farmers had no significant impact on the willingness of forest land’s management rights transfer, that is, difficulties that farmers perceived in the implementation of forest land’s management rights transfer did not significantly affect their decision-making willingness and (3) the different results of the two models’ analysis on the impact of subjective norm on the willingness of forest land’s management rights transfer need further study and verification.