A wireless memory card reader comprises a card insertion read/write device and a host unit read/write device. The card insertion read/write device further comprises a casing with a card slot and an inner card socket for being inserted with a memory card, a printed circuit board received in the casing with a required circuit thereon, a wireless transmission driver fixed to the printed circuit board for a signal being wave-mixed, demodulated and amplified, a battery seat with at least a battery arranged at a lateral side of the casing for supplying the power needed by the circuit, a card socket fixed to the printed circuit board and connecting with the circuit for being inserted with the memory card, and an antenna connected to the printed circuit board for sending and receiving radio signals. The host unit end read/write device further comprises a casing, a printed circuit board received in the casing with a required circuit thereon, a wireless transmission driver fixed to the printed circuit board for the signal being wave-mixed, demodulated, and power amplified, and a USB lead wire with a connector extending outward from the casing.