The invention discloses improved light emitting and receiving equipment. The improved light emitting and receiving equipment comprises a substrate, a receiving device arranged on the substrate and a pivoting device arranged at the lower end of the substrate and capable of driving the substrate to rotate; the receiving device comprises a first sinking cavity disposed in the substrate and having anopening upward; first guide grooves are arranged in the inner walls of the left side and the right side of the first sinking cavity in a penetrating mode; the upper end of the inner wall of the firstsinking cavity is fixedly provided with a spiral block; a first sliding block capable of sliding up and down is disposed in the first sinking cavity; first guide blocks inserted into the first guide grooves are fixedly disposed on the left and right end faces of the first sliding block; a first driving machine is fixedly disposed in the first sliding block; and the upper end of the first driving machine is connected with a screw rod which extends out of an opening at the upper end of the first sinking cavity through the rotating shaft in a power matching manner.