The invention relates to a portable wireless vital sign monitor, which comprises terminal detection equipment and wireless receiving equipment, wherein the terminal detection equipment comprises a single chip microcomputer control module, a sensor acquisition module, a terminal coordinator, an LCD (liquid crystal display) display module and a power module; the wireless receiving equipment comprises a main coordinator and a computer, wherein the computer supplies power to the main coordinator. According to the portable wireless vital sign monitor disclosed by the invention, the vital sign signals comprising the body temperature, the pulse, the respiratory rate and the blood pressure of a user, which are collected by the terminal detection equipment, are processed, displayed and sent; the vital sign signals are received by the wireless receiving equipment and are displayed by a computer. The portable wireless vital sign monitor has the characteristics of low energy consumption, low cost, safety, reliability, strong instantaneity, high detection precision and convenience in carrying.