The invention provides a production method for biomass diesel oil and bunker fuel oil.The production method includes the following steps that original biomass oil or hydrofined biomass oil is added into a coal-tar whole fraction, the mixture is stirred till oil residues are settled, the oil residues are removed, and mixed oil is obtained; the mixed oil is hydrofined and fractionated to obtain the diesel oil and the bunker fuel oil.By means of the method, impurities such as ash, asphaltene, sulfur and metal can be deeply removed, and the operation cycle of a device can be prolonged.