The invention discloses an equidistant light distribution lamp. The lamp structurally comprises a mounting groove, an assembling block, an operation box, a base and a connecting plate, the mounting groove is in interference fit with the connecting plate, the mounting groove and the assembling block are of an integrated structure, the assembling block is in clearance fit with the base, the assembling block is mechanically connected with the operation box, the operation box is provided with a shell, a fixing base, a connecting base, a light distributor, an electrode block and an electric bar, the shell is fixedly connected with the fixing base, and the fixing base is movably clamped with the connecting base. The cover body is of a three-quarter spherical cover structure, the light distribution structure is further arranged in the cover body, the cover body extends out of equipment under cooperation of a lifting block, the contact area between the cover body and the outside is increased,and the radian of the light source during divergence is close to the arc shape, so that when the contact area of the cover body of the spherical structure is increased, the equipment can prevent the divergence area of the light source from being reduced, the divergence angle of the light distribution structure is increased accordingly, and the irradiation area of the equipment is increased.