An LED spot lamp with double sides emitting light including a lamp cap, a lamp cup with one end connected with the lamp cap together and a lens connected to the other end of the lamp cup is provided. A cavity is encircled by the lamp cup and the lens. An LED light source including a circuit board provided with LEDs and an LED driver for driving the LEDs to emit light, and a radiator supporting the circuit board and dissipating heat generated by the LEDs are arranged in the cavity. The circuit board includes a main light emitting plate irradiating the lens, and an auxiliary light emitting plate irradiating the direction away from the lens. The lamp cup is of a light transmitting glass structure. The brightness of light emitted from the main light emitting plate is greater than that of light emitted from the auxiliary light emitting plate.