The invention relates to the technical field of 
optics and projection, and particularly relates to a DMD component, a DLP light 
machine and a DLP projection device. The DMD component comprises a base with an 
accommodation groove on one side, a driving plate, a DMD 
chip which is arranged in the 
accommodation groove, a supporting plate and a fixation frame with an embedded through hole. A number of elastic hooks are arranged on the edge of one side of the embedded through hole. The driving plate is fixedly clamped between the fixation frame and the supporting plate through a 
fastener. The base is embedded into the embedded through hole from one side, which is close to the driving plate, of the fixation frame, and the elastic hooks on the other side hook the edge of the inner wall of the 
accommodation groove and contact the surface of the DMD 
chip. According to the invention, the accuracy and stability of the contact between the DMD 
chip and the contact of the driving plate are ensured; the quality of the final 
projection screen is improved; the difficulty of disassembly and 
assembly and the requirement on the size of associated structural members are reduced; the efficiency of 
processing and production is improved; and the production cost is reduced.