Efficient die changing trolley and die changing method

The invention relates to the field of extrusion blow molding dies, in particular to an efficient die changing trolley and a die changing method. The efficient die changing trolley and the die changingmethod involve a roller conveying belt assembly, a die locking assembly and a die changing trolley assembly, wherein the roller conveying belt assembly is used for placing and conveying dies, the roller conveying belt assembly is slidably connected with the die changing trolley assembly through a sliding rail, the mold locking assembly is fixedly installed at the bottom of the roller conveying belt assembly, a mold locking piece can pop up to the positions among rollers of the roller conveying belt assembly to lock the dies, a height adjusting device and trundles are arranged on the die changing trolley assembly, and the die changing trolley assembly can drive the roller conveying belt assembly to move and adjust the height of the dies placed on the roller conveying belt assembly, Die moving is carried out by mov