The invention discloses a USB memory card printer, and the printer comprises a card box which is used for accommodating a plurality of USB memory cards; a card conveying module which is used for pulling the USB memory cards out of the card box and conveying the USB memory cards along a conveying path, wherein the conveying path is communicated with the card box; a reading-writing module which is set along the conveying path, and is used for carrying out the data reading and/or writing of the USB memory cards when the USB memory cards reaches a reading-writing region; a printing module which isdisposed above the conveying path in a crossing manner and is used for printing printed contents on the USB memory cards when the USB memory cards reaches a printing region; and a control module which is electrically connected with the card conveying module, the reading-writing module and the printing module and is used for controlling the card conveying module, the reading-writing module and theprinting module. According to the invention, the printer achieves the automatic pushing of the memory cards, can achieve the reading/writing of data files from/in the USB memory cards, also can printimages and characters on the upper surfaces of the USB memory cards, is simple in structure, and is easy to operate.