The invention discloses an LED tin immersion process which comprises the following steps: S0, providing an LED tin immersion machine, wherein the tin immersion machine comprises a feeding device, a trim waste removing device, a soldering flux spraying device, a tin immersion device, a cleaning device, a first drying device, a protecting water spraying device, a second drying device, a discharging device and a transfer disc which are arranged in sequence, wherein the transfer disc is used for transferring the LEDs subjected to trim waste removing among the devices and multiple fixing holes used for fixing the LEDs are formed in the transfer disc; S1, feeding, namely filling the packaged LEDs; S2, removing trim waste from the packaged LEDs; S3, performing tin immersion on the LEDs; S4, cleaning and drying; and S5, discharging after the tin immersion operation is ended. According to the LED tin immersion process disclosed by the invention, the LED production efficiency is improved, the production cost is reduced, the good product quality is guaranteed, and the process is simple and environment-friendly.