The invention discloses a boulder blasting construction method. The construction method comprises the following steps of setting a blast hole position, carrying out drilling construction, carrying outblast hole acceptance, machining an explosive bag, loading an explosive into a blast hole, filling the blast hole, blasting a circuit, carrying out on-site warning, and carrying out detonation, grouting and hole sealing. According to the boulder blasting construction method, the blasting is thorough, the grain size of the boulder after blasting is small, the construction progress of a cutter discis not affected, the damage to the cutter disc is reduced, the service life of the cutter disc is prolonged, and the underground blasting type blasting mode is high in safety.