The invention discloses a high-yield dense planting method of asparagus. The planting method is characterized by comprising the following steps of arranging a planting field, densely planting and cultivating asparagus, erecting a trellis and harvesting the asparagus. According to the asparagus planted by means of the method, the planting density of the asparagus is greatly increased, the yield ofthe asparagus is correspondingly increased, and the quality of the asparagus is correspondingly improved. In an asparagus planting process, asparagus stems can be straightened for several years through one-time erection of the trellis, so that the cost for erecting the trellis is effectively reduced, and the energy consumption for management is reduced. Compared with an existing method for using bamboo poles for erecting a trellis, the method has the advantage that a large number of human resources are saved.