The invention discloses an automatic hand washing and drying device which comprises a cabinet body, a basin body installed on the cabinet body and made of a nonferromagnetic material, a faucet installed on the upper rear side of the cabinet body, and a brushing mechanism installed in the basin body. The water outlet of the faucet is located in the middle above the basin body. The brushing mechanism comprises a first brush, a second brush, a third brush and a fourth brush which are installed in the basin body. Lateral brush bases are symmetrically formed on the two side walls of the basin body. The first brush and the second brush are installed in the lateral brush bases on the two sides in a horizontal sliding mode. The outer end of each lateral brush base is connected with a tap water pipe through a hose. A middle brush base is formed in the middle of the inner front side wall of the basin body. The third brush and the fourth brush are rotationally connected to the middle brush base. A liquid soap tank is installed in the cabinet body. The lower portion of the liquid soap tank is connected with a water pump. The middle brush base is connected with the water outlet end of the water pump through a hose. The automatic hand washing and drying device is reasonable in structural design, beneficial for part maintenance and replacement and high in brushing efficiency.