A wearable blood pressure measurement apparatus, comprising a measurement apparatus body, a binding component, an inflation component, a gas pressure sensor, and a gas bag and a pressure sensor that are disposed inside or on an inner side of the binding component, wherein the measurement apparatus body is separately connected to the binding component, the inflation component, the gas pressure sensor, and the pressure sensor, and the gas bag is separately connected to the inflation component and the gas pressure sensor; the pressure sensor is configured to: collect a current pressure value of the binding component, and send the collected current pressure value to the measurement apparatus body; the measurement apparatus body is configured to: receive the current pressure value, and determine whether the current pressure value is greater than a preset first pressure threshold; wherein the measurement apparatus body is further configured to: if the current pressure value is greater than the first pressure threshold, remind the user that a watch band is too tight; wherein the measurement apparatus body is further configured to: if the current pressure value is less than or equal to the preset first pressure threshold, send an inflation instruction to the inflation component and send a gas pressure collection instruction to the gas pressure sensor; the inflation component is further configured to: receive the inflation instruction, and inflate the gas bag based on the inflation instruction; and the gas pressure sensor is further configured to: receive the gas pressure collection instruction, collect the current gas pressure value of the gas bag based on the gas pressure collection instruction, and send the collected current gas pressure value to the measurement apparatus body; the measurement apparatus body is further configured to: receive the current gas pressure value, and when the current gas pressure value reaches a preset gas pressure threshold, determine inflation duration of the gas bag, and determine whether the inflation duration is greater than a preset first duration threshold; wherein the measurement apparatus body is further configured to: if the inflation duration is greater than the preset first duration threshold, remind that the binding component is too loose; and if the inflation duration is less than or equal to the preset first duration threshold, the measurement apparatus body, the inflation component, the gas pressure sensor, and the gas bag are further configured to measure a systolic blood pressure and a diastolic blood pressure of a user. the measurement apparatus body is separately connected to the binding component, the inflation component, the gas pressure sensor, and the pressure sensor, and the gas bag is separately connected to the inflation component and the gas pressure sensor; the pressure sensor is configured to: collect a current pressure value of the binding component, and send the collected current pressure value to the measurement apparatus body; the measurement apparatus body is configured to: receive the current pressure value, and determine whether the current pressure value is greater than a preset first pressure threshold; wherein the measurement apparatus body is further configured to: if the current pressure value is greater than the first pressure threshold, remind the user that a watch band is too tight; wherein the measurement apparatus body is further configured to: if the current pressure value is less than or equal to the preset first pressure threshold, send an inflation instruction to the inflation component and send a gas pressure collection instruction to the gas pressure sensor; the inflation component is further configured to: receive the inflation instruction, and inflate the gas bag based on the inflation instruction; and the gas pressure sensor is further configured to: receive the gas pressure collection instruction, collect the current gas pressure value of the gas bag based on the gas pressure collection instruction, and send the collected current gas pressure value to the measurement apparatus body; the measurement apparatus body is further configured to: receive the current gas pressure value, and when the current gas pressure value reaches a preset gas pressure threshold, determine inflation duration of the gas bag, and determine whether the inflation duration is greater than a preset first duration threshold; wherein the measurement apparatus body is further configured to: if the inflation duration is greater than the preset first duration threshold, remind that the binding component is too loose; and if the inflation duration is less than or equal to the preset first duration threshold, the measurement apparatus body, the inflation component, the gas pressure sensor, and the gas bag are further configured to measure a systolic blood pressure and a diastolic blood pressure of a user.