The utility model provides a compound pattern signal lamp which can interchange an arrowhead and a circular-shaped pattern each other, which is composed of a lamp cover, a lamp board and a control board, wherein, the lamp board is a printed board which is fixedly provide with a plurality of light emitting diodes; the light emitting diodes are distributed together according to the array of the arrowheads and the circular-shaped patterns; the control board is provided with two sets of depressurization rectification circuits which are totally connected with the ground; the output voltage is respectively connected with two ends of the light emitting diode which displays two patterns. The utility model is characterized in that the utility model can be used as the standardized signal lamp as well as the signal lamp of carriageways.