The invention discloses an Internet of things-based solar LED (Light Emitting Diode) traffic signal lamp, which comprises a lamp pole, a lamp holder stand and a lamp holder, wherein a solar battery panel, a controller, a wireless communication unit and a storage battery are mounted on the lamp pole; the lamp holder comprises a mounting plate; 3 signal lamp units are mounted on the mounting plate;the signal lamp units comprise lampshades and main circuit boards; multiple LED lamp beads are mounted on the main circuit board; transverse pipes are fixed on the main circuit boards; the transversepipes are fixedly connected with vertical pipes; a first planar beam splitter is arranged at an intersection of each transverse pipe and each vertical pipe; each transverse pipe surrounds one LED lampbead on each main circuit board; the open end of each transverse pipe is fixedly adhered with each main circuit board through an adhesive; an auxiliary circuit board is mounted on the outer side of the closed end of each transverse pipe; one LED lamp bead is mounted on the auxiliary circuit board; and a light intensity detector is mounted at one end of a horizontal pipe. The signal lamp disclosedby the invention can realize remote Internet of things control and has an automatic alarming function for a fault.