Abstract: The present application discloses an error-proof double-locking quick connector, comprising a male plug provided with a boss and a housing (1), a cavity structure is provided in the housing (1), and the cavity structure is provided with a first insertion hole (11), a second insertion hole (12), a first limiting hole (13) and a second limiting hole (14), and a positioning block (15) is also arranged in the cavity structure. A locking device is inserted into the first insertion hole (11), a positioning card is inserted into the second insertion hole (12). In the present application, a locker and a positioning card are connected and fixed on the housing, which has a double protection effect on the fixing of the male plug, and is also convenient for observing the installation state, avoiding the occurrence of installation falling off, the structure is simple, and it is easy to disassemble.