The invention relates to the technical field of demolition blasting construction methods, in particular to a demolition blasting trial blasting method. The demolition blasting trial blasting method comprises the following steps of (1) selecting a component in a building to be detonated as a trial blasting component; (2) drilling a plurality of trial blasting holes not interfering with each other in the component and filling different quantities of explosives into the different trial blasting holes; (3) detonating the explosives in all the trial blasting holes, observing the detonated componentand selecting the explosive quantity of the trial blasting hole with the best trial blasting effect as the optimal explosive quantity; and (4) carrying out explosion design work on demolition blasting construction according to the optimal explosive quantity. The trial blasting method is simple and high in efficiency. The trial blasting workload is reduced. The more accurate blasting explosive quantity can be obtained. No burden is caused to the blasting safety management work. The demolition blasting trial blasting method has great promotional value.