The invention provides a suspension type composite storage box structure, and belongs to the technical field of spacecraft weight reduction. The structural weight is reduced, and structural efficiency is reduced. The suspension type composite storage box structure comprises four composite storage boxes, an annular frame and a cross beam. The cross beam is fixed to the inner side of the annular frame to form four frame beam supports, and the frame beam supports are sector-shaped frame structures with the central angle of 90 degrees. The four composite storage boxes are fixed to the four frame beam supports respectively, and only internal pressure loads and loads generated by self mass are borne in the storage boxes. The four composite storage boxes are fixed through the frame beam supports, the volume of each storage box is increased under the condition that the total structure volume is unchanged, the number of the storage boxes is reduced, therefore, the available space of the structure is increased, and the aims of reducing the structural weight and improving the structural efficiency are achieved.