The invention discloses a safety protection device for building construction. The safety protection device comprises a safety helmet, left and right sides of the safety helmet are symmetrically connected with flexible connection frames through clamping mechanisms, an earmuff is installed at one end of each flexible connection frame, a noise reduction unit is installed on each earmuff, a mounting seat is fixed on the side face of the safety helmet, and an open-source single-chip microcomputer and a power source are respectively installed on side faces of the mounting seat. The safety protectiondevice is multifunctional, the earmuff and the safety helmet are assembled through the clamping mechanisms, convenience in assembly and disassembly as well as in use is achieved, noise is eliminatedthrough the noise reduction unit, harmful effect of noise on construction staff is avoided, physical and mental health of the construction staff is guaranteed, the head is fixed through a head fixingunit, buffering function is achieved, operational performance of the safety protection device is greatly improved, a lighting unit with adjustment capacity is used for illumination, and different usage requirements are conveniently met.