The invention discloses a bag pulse valve blowing fault diagnosis method. The method comprises the following steps: when any one of pulse blowing processes is finished, comparing the lowest pressure value of a gas tank after actuation of a bag pulse valve with a preset minimum pressure value of the gas tank after actuation of the bag pulse valve, comparing a current pressure value of the gas tankafter actuation of the bag pulse valve with a preset lower limit of a pressure recovery value of the gas tank after actuation of the bag pulse valve, or comparing a current time value of a timer witha preset corresponding value in a first time duration, acquiring corresponding comparative results, and determining a fault diagnosis result of the bag pulse valve according to the corresponding comparative results. According to the method, the fault of the bag pulse valve can be directly diagnosed according to the comparative results, so that the problems that differential pressure is increased,heavy dust on a bag happens occasionally and the service life of the bag is shortened as manual check is poor instantaneity and the fault of the bag pulse valve cannot be found timely can be avoided.