Earphone recognition device

The invention relates to an earphone recognition device. The earphone recognition device comprises a main control chip, a first interface, a second interface, a third interface and a fourth interface,wherein the first interface, the second interface, the third interface and the fourth interface are arranged in an earphone jack, and respectively accessed to a port of an earphone; a first public voltage detection end of the main control chip is connected with the first interface; a second public voltage detection end of the main control chip is connected with the second interface; a first earphone jack detection end of the main control chip is connected with the third interface; a second earphone jack detection end of the main control chip is connected with the fourth interface; the main control chip is used for first voltage of the first public voltage detection end, second voltage of the second public voltage detection end, third voltage of the first earphone jack detection end and fourth voltage of the secon