The invention relates to a measurement device for volume deformation of foam concrete under a condition of steam curing, and aims at solving the problems that in the prior art, under the environment of steam curing, measurement for the volume deformation of the foam concrete in the early period is inaccurate and the continuous measurement for deformation of the foam concrete can not be achieved. The device includes a box cover, a box body, a heating water tank, a plurality of temperature sensors, automatic windshield wiper components, a computer, a connecting component, support bases, a temperature control box, two supports, two beams, multiple separation supports, multiple heating pipes, multiple reflection targets, a plurality of debugging modules and multiple laser displacement sensors, wherein the bottom of the box body is provided with the heating water tank and the temperature control box, the top of each debugging module is provided with a refraction target, the automatic windshield wiper components are arranged on the box cover, the laser displacement sensors are connected with the computer through circuits, and each temperature sensor is connected with the temperature control box. The measurement device for the volume deformation of the foam concrete under the condition of steam curing is applied to the field of concrete deformation measurement.