The utility model discloses a bicycle environmental protection lamp convenient to installation, including lamp body, limiting spindle and fixing base, limiting spindle is rotatory to be installed in alamp body side surface, the fixing base welds the one end in limiting spindle, fixing base both sides surface is all inlayed and is had the locating convex block, locating convex block surface movable mounting has a locating clamping plate and no. Two locating clamping plate, a locating clamping plate and no. Two locating clamping plate one end are all inlayed and are had the fastening to detain,the rotatory fastening bolt that installs in surface is detained in the fastening. The utility model discloses a locating clamping plate and no. Two locating clamping plate install whole bicycle lampbuckle on the bicycle, through the rotatory fastening bolt who fastens the rotatory installation in knot surface, make and fasten each other between a locating clamping plate and no. Two locating clamping plate, fix whole bicycle lamp on the bicycle, and the location layer board of the rotatory installation in fixing base bottom is passed through to the while, can strengthen whole bicycle lamp'ssteadiness, avoids bicycle lamp the condition of displacement to appear.