Experimental box for mini watermelon breeding and use method thereof

The invention is suitable for the related technical field of watermelon planting, and provides an experiment box for mini watermelon breeding and a using method thereof.The experiment box comprises a bottom plate, a main box body is fixedly connected to the bottom plate, a containing unit used for containing mini watermelons is arranged on the bottom plate, and a nutrient solution adding assembly used for adding a nutrient solution is arranged on the bottom plate; through arrangement of the nutrient solution adding assembly, a pushing plate at a proper position is selected according to the position of a planting box body needing nutrient solution adding, the pushing plate is pushed to the upper end along a penetrating groove, a magnetic strip at the lower end of the pushing plate is magnetically connected with a third connecting plate, and then a pushing air cylinder is started to drive the third connecting plate to move; a push plate is driven to make contact with the side face of a liquid outlet box body, t