The invention relates to a single-handle constant-temperature pressure-measuring valve core which comprises a valve sleeve, a temperature adjusting component arranged in an inner cavity of the valve sleeve from top to bottom in concert with the valve sleeve, a thermal sensitive element, an adjustor and an offsetting spring as well as a water diversion mechanism and a compress sealing part which are sheathed in the inner cavity of the valve sleeve; a cold water inlet and a hot water inlet are opened on the valve sleeve, and a water outlet is opened in the middle of the valve sleeve; the waterdiversion mechanism matches with the cold water inlet and the hot water inlet to control the cold water passage and the hot water passage, and a cold water control port and a hot water control port which are matched with the cold water passage and the hot water passage are provided; the compress sealing part forms an airtight space together with the inner cavity of the valve sleeve and presses the water diversion mechanism inside the valve sleeve; under the action of the thermal sensitive element and the offsetting spring, the adjustor floats between the cold water control port and the hot water control port. In the invention, the constant temperature is guaranteed, meanwhile a zigzag water inlet passage is formed, which has an obvious effect on balancing the water inlet pressure, and thevalve core also has the advantages of simple structure, security and reliability.