A crossbow is capable of switching between a compound crossbow and a recurve crossbow, comprising a fore unit and a stock. The stock comprises a stock body, and the stock body is provided with a front end. The fore unit is provided with a mounting end; the mounting end of the fore unit is mounted on the front end of the stock body through a connecting bolt, and the mounting end and the front end are of detachable mounting structures. The fore unit is a compound riser unit or a recurve-bow unit, which is assembled with the stock to constitute a compound crossbow or a recurve crossbow. In the invention, the stock can be quickly assembled with and detached from the compound riser unit and the recurve-bow unit to switch the crossbow between the compound crossbow and the recurve crossbow. The users' expenses are reduced, and the operation is more convenient.