The invention discloses a forming cylinder 
system structure in SLM rapid forming equipment. According to the forming cylinder 
system structure in the SLM rapid forming equipment, a lifting mechanism is driven by the corresponding 
servo motor, a 
ball screw nut pair is driven by a right-angle speed 
reducer to move, then up-down movement of a preheating 
system structure is achieved, and the relevantthickness of the 
powder laying layer is controlled. The preheating 
system structure heats a base plate through a cast aluminum heating plate, a 
thermocouple is adopted as a temperature sensor, real-
time control over the temperature is achieved, heat insulation silk floss and a heat insulation plate are additionally arranged below the heating plate for relevant heat insulation, and sealing rubber strips are installed on the side edges of the base plate and the heat insulation plate to prevent machined 
metal powder from falling along a forming cavity. According to the forming cylinder 
system structure in the SLM rapid forming equipment, the lifting mechanism is used for accurately controlling the thickness of the 
powder laying layer, the preheating 
system structure is used for accurately controlling the 
machining temperature of the 
metal part, the 
machining environment of the whole 
metal part is optimized, and the 
machining surface quality of the metal part is controlled and improved.