The invention provides an improved logistic trunk device. The device comprises a trunk frame and a logistic cabinet, first insertion grooves which are bilaterally and sagittally symmetrical are formedin the bottom wall of the logistic cabinet, second insertion grooves are formed in the top walls of the first insertion grooves, fixing assemblies matched with the second insertion grooves are arranged in the trunk frame, the fixing assemblies comprise sliding cavities which are formed in a bilaterally symmetrical mode with openings facing upwards, a communication groove is formed between the twosliding cavities, sliding grooves with openings facing the sliding cavities are formed in the end walls, away from the communication groove, of the sliding cavities, sliding blocks are installed in the sliding grooves in a vertical slidable mode, a sliding frame is installed in the communication groove in a vertical slidable mode, fixing wedge blocks are fixedly installed in the sliding cavities,first wedges are arranged on the fixing wedge blocks, through grooves are formed in the fixing wedge blocks, sliding wedge blocks are installed in the sliding cavities in a sliding mode, and second wedges matched with the first wedges are arranged at the lower ends of the sliding wedge blocks.