The invention discloses an automatic solar cell disinfection knapsack and belongs to the field of application of solar products to daily life. The automatic solar cell disinfection knapsack comprises a knapsack body and a solar sub-bag, wherein a solar panel is arranged at one end of the solar sub-bag and a reflection plate is arranged at the other end of the solar sub-bag; a connecting layer is connected between the solar panel and the reflection plate; a cavity is formed in a front surface of a knapsack body; the area of the cavity is equal to the area of the solar panel; the solar panel is movably connected onto the cavity of the knapsack body; the reflection plate is movably connected into the knapsack body; and a packaging strip between solar cell sheets of the solar panel adopts a high-purity polyethylene material for filtering ultraviolet rays into the knapsack body. According to the automatic solar cell disinfection knapsack, the solar panel is arranged on an outer surface of the knapsack and high-purity polyethylene is used as the packaging strip between cell assemblies of the solar panel; the problem that bacteria bred in the knapsack are not completely cleaned is solved; the ultraviolet rays in solar light penetrate through the packaging strip to emit into the knapsack for disinfection and sterilization; and solar energy is collected and a sterilization effect is realized.