Standard soil sample combined making instrument for measuring dry density of soil for road engineering roadbed

The invention relates to a standard soil sample combined making instrument for measuring the dry density of soil for a road engineering roadbed, and belongs to the technical field of a road engineering measuring instrument. The invention aims to solve the problems that the existing standard soil sample instrument for measuring the dry density of soil for a road engineering roadbed is unreasonablein integrated structure design and tedious in operation and cannot meet the measuring standard requirement on the dry density of the soil for the road engineering roadbed. A sprayer is arranged in a soil stirrer main body to form a combined type humidifying stirring machine, the front part of the combined type humidifying stirring machine is connected with soil crushing machinery, the front part of the soil crushing machinery is connected with a soil drying box, the back part of the combined type humidifying stirring machine is connected with an electric compaction test apparatus, and the bottom cointegrate of the ele