The invention aims to provide a drilling and chamfering composite quick forming tool. The drilling and chamfering composite quick forming tool has the advantages that the drilling and inner hole deburring integrated tool is formed according to merits of a short-hole drill and merits of a spring tool, two traditional machining tools are integrated into the single drilling and chamfering composite quick forming tool, and accordingly the cost of the drilling and chamfering composite quick forming tool can be greatly reduced; drilling and inner hole deburring can be completed on the same equipment and machine, so that the cost of the equipment can be saved; an operation worker can complete machining parts, so that the labor cost can be reduced; the machining period can be greatly shortened, and the drilling and chamfering composite quick forming tool is high in efficiency; each part can be machined after being clamped at one step and can be completely machined at one step, accordingly, repeated positioning can be omitted, and the machining precision can be improved.