The invention belongs to the technical field of medical equipment, relates to an in-bed patient transfer device, and specifically provides a multifunctional in-bed patient transfer apparatus. The multifunctional in-bed patient transfer apparatus comprises a first transfer assembly, a second transfer assembly and a third transfer assembly, the first transfer assembly, the second transfer assembly and the third transfer assembly are connected through pins, the first transfer assembly is formed by a first walking support and a first support plate, the second transfer assembly is formed by a second walking support, a second support plate and an armrest unit, and the third transfer assembly is formed by a third walking support and a third support plate. According to the apparatus, three foldable transfer assemblies are adopted, the translation operation of the apparatus can be realized, folding can be performed according to a specific requirement of the patients, the attitude is adjusted, the apparatus is applicable to various medical environments, and the transfer efficiency of patients is greatly improved. The transfer apparatus is additionally provided with a toilet port, the patients can be helped to go to the toilet in cooperation with auxiliary equipment, and convenience is provided for the patients.