The invention relates to a platelet transfusion oscillator, comprising a left side box body and a right side box body, wherein a platelet bag is arranged in the left side box body, and the platelet bag is suspended on the upper inner wall of the left side box body. The power unit is provided in the right-hand box for supplying the oscillation unit with the power required for oscillation to occur.The oscillating device is arranged in the left side box, the oscillation device comprises a support part and an oscillation part, wherein a gap is provided between the support part and the oscillationpart, the platelet bag is located in the gap between the support part and the oscillation part and is in contact with the support part and the oscillation part, respectively, and the oscillation partis connected with the power device and oscillates the platelet bag by the power provided by the power device. The invention has the advantages of simple structure, convenient operation and portability, oscillates the platelet bag with a constant oscillation frequency in the process of ensuring platelet transfusion, prevents platelet agglutination without damaging platelet components caused by excessive oscillation, frees nursing staff and improves work efficiency.